Pope Leo’s Ice Blessing

We need to hear this in our Protestant churches in the United States every Sunday (and Wednesday and Sunday night and Tuesday during gatherings, etc.). Glad to see Leo taking on the ecological mantle from Francis.

Emphasis mine in the quote here…

Pope Leo XIV blesses glacier ice urging global leaders to act on climate change – India Today:

Citing Francis’s text, Leo recalled that some leaders had chosen to “deride the evident signs of climate change, to ridicule those who speak of global warming and even to blame the poor for the very thing that affects them most.”

He called for a change of heart to truly embrace the environmental cause and said any Christian should be onboard.

“We cannot love God, whom we cannot see, while despising his creatures. Nor can we call ourselves disciples of Jesus Christ without participating in his outlook on creation and his care for all that is fragile and wounded,” he said, presiding on a stage that featured a large chunk of a melting glacier from Greenland and tropical ferns.

The New Ecozoic Reader

Prof. Sam Mickey discusses the volume he edited titled The New Ecozoic Reader this week. If you’re anywhere interested or adjacent to the study of Religion and Ecology, I highly suggest listening to the podcast episode here as well as reading at least the Introduction here to The New Ecozoic Reader (available for free download or you can order a print copy as well)! 

Lisa Dahill’s chapter on rewilding Christianity was particulary fascinating to me.

Season Five | Yale Forum on Religion and Ecology:

In this episode of Spotlights, our host discusses a very special issue of The New Ecozoic Reader that has just been released. This special issue, edited by the Forum’s own Sam Mickey and Sam C. King offers retrospective and prospective views on the field of religion and ecology: looking at where we’ve been, where things stand now, and how the field, and our work together, could evolve going forward. The issue is very intergenerational and includes essays by both esteemed and established figures in the field, and younger scholars, just emerging on the scene. The issue includes a foreword by Iyad Abumoghli of UNEP Faith for Earth Coalition, a preface by Sam King and Sam Mickey, an Introduction by Mary Evelyn Tucker and John Grim, and contributions from: Heather Eaton, David Haberman, Elizabeth Allison, Whitney A. Bauman, Ibrahim Ozdemir, Jason Brown, Kim Carfore, Sarah Pike, Lisa E. Dahill, Nancy Wright, Jim Robinson, Melanie L. Harris, Christopher Key Chapple, Dan Smyer Yu, Charisma K. Lepcha, Philip P. Arnold, Sandra L. Bigtree, Graham Harvey, Russell C. Powell, Rachael Petersen, Terra Schwerin Rowe, and Larry Rasmussen.

Viriditas and the Ecology of the Cross: Hildegard’s Greening Vision Meets a Kenotic Cosmos

Greening Ancient Wisdom for Today’s Crisis

On many mornings, I find myself sitting beneath the black walnut tree in my backyard, contemplating how an ancient abbess’s wisdom speaks to our ecological crisis. Hildegard of Bingen, 12th-century mystic, healer, and visionary, loved to talk about viriditas, the “greening” life-force of God in creation. She lived in a world where forests were alive with divine Light, and every medicinal herb carried a spark of God’s vitality. As a PhD student in Ecology, Spirituality, and Religion, I’m continually amazed by how Hildegard’s medieval insights resonate with what I call the Ecology of the Cross, or a theological framework that challenges our modern extractive paradigms with a vision of kenosis, interdependence, and sacred entanglement. In this post, I want to weave together Hildegard’s greening spirituality with the Ecology of the Cross, exploring how her ancient ontology can inform a Christian ecological lens today.

Hildegard’s Viriditas: Greening Power and Divine Immanence

Hildegard of Bingen (1098–1179) was a Benedictine abbess who saw the natural world lit up from within by God’s presence. Surrounded by the lush Rhineland forests, she perceived God’s “living power of light” energizing all creation, a verdant force she famously named viriditas, or greenness or greening power. In Hildegard’s theology, viriditas is the Holy Spirit’s life flowing through plants, animals, and elements, infusing them with vitality and growth.

“The greening power of the earth is the viriditas, which is the living light of the Holy Spirit… It is the love of God that flows through all creation, bringing forth new life and growth,” Hildegard wrote.

This was no poetic flourish for her; it was a literal cosmological principle. In her mystical visions, the entire universe even appeared as a tree, “verdant with God’s wisdom” and pulsing with divine life. For Hildegard, God was not a distant clockmaker but immanent in nature – present in the sap of trees, the humors of the human body, the cycles of the cosmos. All creation, she believed, is “alive with God’s presence” and thus sings a song of praise back to its Creator.

Crucially, Hildegard’s spirituality was deeply non-dualistic. She did not split spirit from matter. One commentator notes that she held a “theandrocosmic” ecology of life – a holistic view of reality as a dialogue between God (theos), humanity (anthropos), and the cosmos. This means Hildegard saw everything as interconnected as the health of the soul, the health of the body, and the health of the Earth were all of a piece. Indeed, Hildegard was a renowned healer in her time as a botanist and physician who composed texts on herbal medicine and the human body. She left behind volumes of wisdom on topics ranging from healthcare and natural remedies to music, ethics, and theology.

Her medical work (such as Physica and Causae et Curae) catalogued plants, stones, and animals, not just for their physical properties but for their spiritual virtues. In Hildegard’s eyes, studying nature was a way to understand God’s ongoing creative work. Healing a body with herbs and prayer was part of healing the ruptured relationship between humanity and creation. Divine immanence for Hildegard meant that the Creator’s power “flows through all creation,” so caring for creation was nothing less than an act of love for God. She warned that when we harm the earth, we harm ourselves, because we are inextricably part of this sacred web: “When we destroy the earth, we destroy ourselves,” she wrote bluntly. It’s hard to imagine a more ontologically rich affirmation of interdependence from the Middle Ages.

The Cross as Tree of Life: A Paradigm of Kenosis

Centuries before terms like “ecotheology” existed, Hildegard and her fellow medieval mystics were already linking the Cross with creation. In Christian symbolism, the cross of Christ has long been understood as a kind of Tree of Life. The New Testament itself refers to the cross as a “tree” (xylon in Greek which also refers to “clubs” throughout the Gospels interestingly enough) on which Christ was crucified (Acts 5:30; 1 Pet. 2:24). Early Christians couldn’t miss the irony of a wooden instrument of execution becoming the cosmic tree of redemption. Hildegard expands this imagery with her vision of the verdant universe. We might say her viriditas concept lets us imagine the cross not as dead wood, but as a tree greening with new life by God’s power. In one of my favorite poetic images, “even the cross, that ruined tree, bears sap enough to green the nations”… in other words, through the cross’s wood flows the viriditas of God, bringing renewal out of death.

This brings us to what I call the Ecology of the Cross. At its heart, this framework re-imagines the cross as more than a ticket to individual salvation; it is a paradigm of kenosis, interconnection, and humble participation in the wider community of creation. The Greek word kenosis refers to Christ’s “self-emptying” love (Phil. 2:5–8). On the cross, according to Christian faith, God-in-Christ empties Himself by pouring out divine love in utter vulnerability, even to the point of death. Traditionally, Christians see this as the path to resurrection and new life. But what if we also view it through an ecological lens? Ecology of the Cross suggests that the cross is “an ecological gesture of descent: a humble participation in the mutual vulnerability of the world”. In Jesus’ self-emptying sacrifice we see a model for how we humans should relate to the more-than-human world with radical humility instead of domination, willing to relinquish our privilege and power for the sake of healing relationships.

Such a kenotic ecology directly critiques modern extractive paradigms. Our industrial-technocratic society has often approached nature with an attitude of grasping and exploitation, the very opposite of self-emptying. Forests are logged and burned for profit, rivers are dammed and polluted for convenience, animals are driven to extinction for consumption or farmed for extracting nutrients in non-sustainable and ethically horrible ways. Creation bears the wounds of these extractive systems. In fact, we can literally see it in the trees: “forests today stand as cruciform realities: logged, burned, cut down, yet also central to the healing of the planet”. The cross, in an ecological sense, is present wherever life is suffering under unjust exploitation and wherever sacrificial love is bringing forth healing. The Ecology of the Cross invites us to recognize that the pattern of Christ’s cross, death and resurrection, is woven into Earth’s own rhythms. As I’ve written elsewhere, “the cross is ecological: a revelation of life’s pattern as death-and-renewal, as sacrifice-and-gift”. Every fallen forest that sprouts green shoots from its stump, every species brought back from the brink by compassionate conservation, every community that sacrifices for environmental justice… these are cruciform moments, little enactments of resurrection life.

Sacred Entanglement: Communion Beyond the Human

One of Hildegard’s gifts to us is a vision of sacred entanglement in a cosmos where everything is enfolded in everything else through God’s love. She spoke of the elemental interconnectedness of the four elements, the celestial bodies, and the human being (microcosm mirroring macrocosm). Modern science, with its talk of ecosystems and quantum entanglement, is catching up to this ancient intuition that “all beings are entangled in webs of relation”. Hildegard would agree wholeheartedly. And Christian theology adds: all those relations are grounded in God. Nothing exists outside the divine dance of communion. Significantly, Hildegard’s cosmology didn’t isolate humanity from nature; instead, she saw humans as integrated participants in the community of creation, “a world – everything is hidden in you,” she imagines God saying to each person, for the whole cosmos lives inside of us as we live inside it. This has profound ethical implications… if we and the earth are truly part of one living network sustained by God’s viriditas, then our calling is to nurture that network, to tend and befriend it, not to dominate or ignore it.

The Ecology of the Cross builds on this kind of sacred interconnectedness. It emphasizes that redemption is not apart from creation, but through itthrough roots and branches, through crucifixion and renewal. In Jesus’ crucifixion, God doesn’t pluck souls out of creation; God enters into creation’s deepest pains to transform them from within. The Cross is God with us, with all of us, including the sparrows, the soil, and the stars. This is a profoundly metaphysical statement as it suggests that at the heart of reality (the metaphysical core of existence) there is a cruciform love that ties all things together in a bond of shared being. As theologian Catherine Keller might put it, there is an apophatic entanglement at work – a holy interweaving we only dimly perceive but are nevertheless a part of. Or as philosopher William Desmond would say, standing before a living tree draws us into “the between,” that threshold where mystery breathes through being. Such moments can feel sacramental. Indeed, in a sacramental worldview the material world mediates God’s presence. A forest can be a temple, a river can whisper divine truth. Hildegard, composing her ethereal chants to the viriditas of the Spirit, understood this well. The whole world was her monastery’s cloister garden, alive with God.

For those of us drawn to Christian ecotheology, to speak of sacred entanglement is to affirm what the Gospel has hinted all along: that Christ’s reconciliation “extends to all things” (Col. 1:20) and that creation itself eagerly awaits liberation (Rom. 8:19-21). We find ourselves, then, in a spiritual lineage that runs from saints like Hildegard straight to the present. “From the prophets to Jesus’ parables to Hildegard of Bingen’s viriditas… our tradition is rich with ecological wisdom,” as I’ve noted before on Thinking Religion. The task now is to live into that wisdom.

Kenosis, Viriditas, and Living in Communion

Bringing Hildegard’s mysticism into conversation with the Ecology of the Cross enriches both. Hildegard gives us the vibrant language of greening and the assurance that caring for the earth is an act of love for God. The Ecology of the Cross, for its part, gives us the challenging ethic of kenosis and the call to empty ourselves of pride, greed, and the will-to-dominate so that we can truly serve and commune with our neighbors, human and non-human. Together, these threads form a kind of cruciform ecology of grace as an approach to the environmental crisis that is both deeply spiritual and vigorously practical. It asks us to reimagine what sacrifice means. Instead of the destructive sacrifices demanded by extractive capitalism (where we sacrifice forests and futures on the altar of consumerism or chauvanism), we are invited into the life-giving sacrifice modeled by Christ and celebrated by Hildegard and a sacrifice that gives up self for the sake of renewed life for others. This could look like deliberate simplicity and restraint (a kenotic lifestyle that “lets go” of excess consumption), or like actively bearing the cross of ecological work in its many forms, whether that is replanting a clear-cut area, advocating for environmental justice in our communities, or tending a backyard garden as if it were an altar.

My own theological perspective is rooted in this integration of ancient wisdom and new vision. I’m convinced, as are many others, that our spiritual narratives and our ecological actions are inseparable. When Hildegard urges us to “participate in the love of God” by caring for creation, she is echoing the kenotic love poured out on the cross – a love that holds nothing back, not even life itself, for the sake of beloved creation. This perspective reframes Christian mission: it’s no longer only about saving souls, but about healing relationships across the web of life. It also reframes metaphysical and ontological questions. We begin to ask: What is the nature of being, if not being-with? What kind of world is this, if the Creator chose to wear its flesh and suffer its pains? Such questions lead us into what theologian Thomas Berry called The Great Work of our times and to rediscover ourselves as part of a sacred Earth community and to act accordingly.

In the end, Hildegard’s viriditas and the Ecology of the Cross converge on a message of hopeful, humble participation. Even in a time of climate upheaval, mass extinction, and social fragmentation, we’re invited to see the world with new eyes “to help people see differently and to recover the rooted wisdom of scripture and tradition,” as I often remind churches. We are invited to step into what the Benedictine tradition would call ora et labora, or prayer and work, on behalf of creation, joining our hands and hearts to the greening, healing work God is doing. The Tree of Life stands not as a mere symbol, but as an ongoing reality with the cross planted in the earth, drawing all things into divine communion. Hildegard’s lush visions and the Cross’s stark call both beckon us toward a future where humans live with reverence among our fellow creatures, where we embrace our creaturely limits and gift, and where, by God’s grace, the desert places of our world can bloom again.

As the farmer-poet Wendell Berry has said (in a line that often echoes in my mind when I gaze at a thriving green tree stump): “Practice resurrection.” A tree knows how. By the greening power of God and the self-emptying love of Christ, may we learn how as well.

Platonic Biology

Prof. Segall (one of my amazing Prof’s at CIIS) has a fantastic post here that I very much agree with…

(30) The Return of Platonic Biology – by Matthew David Segall:

Process philosophy offers an alternative proposal that avoids the extremes of both reductive materialism and transcendent idealism. Rather than treating forms as autonomous agents, it understands them as potentiae—non-historical possibilities with patterned relations among themselves and to actuality generally. These possibilities do not act. They ingress. Agency belongs to actual occasions of experience, the events of concrescence in which the physical inheritance of the past meets the lure of unrealized potential. Forms become effective only as they are selected and transformed within the creative advance of living occasions.

Resting Heart Rates

August and Everything After

I made some changes in my life back in May as my semester ended in my PhD studies and my dissertation began to take shape ahead of my 47th birthday.

We did lots of traveling as a family in June and July, I signed some new consulting clients, built a few websites, and had a wonderful summer of adventure. Those changes I made stuck and became routines and rituals. I slept well even in crowded hotel rooms and AirBNB’s in new cities with our children. I noticed my resting heart rate had dropped pretty dramatically.

Then August arrived and brought with it the annual torrent of new teachers and routines and meetings and after school activities and pick ups and drop offs and all things associated with having three young children. I noticed my heart rate had increased again. Things done and things left undone as the Book of Common Prayer reminds us to consider.

Talking with the Black Walnut this week, I’ve been pondering our own human conceptions of time and rhythm as I watch its leaves begin to silently fall here in late September.

I like to tell people that my dissertation (Ecology of the Cross) is my life’s work and that’s what I’m working on… contributing to Thomas Berry’s incantation of The Great Work of our time. Phenomenology has provided the structure for most of my research and thoughts as a part of all that work. Deep down, I realize (thanks to the Black Walnut and resting heart rates) that my life’s work is… my five children.

Maybe that dissertation will play some part in that in the future as they continue to explore, learn, and perceive the phenomena of consciousness and being in new ways. Planting sequoias for them and others who might be interested in what I have to say based on my aging heart and aging skin’s experience.

Ask the questions that have no answers.

Invest in the millennium. Plant sequoias.

Say that your main crop is the forest

that you did not plant,

that you will not live to harvest.

Say that the leaves are harvested

when they have rotted into the mold.

Call that profit. Prophesy such returns.

I think of my aging heart and skin and my aging children and my aging theologies and philosophies. I turn back to Aristotle and Augustine and Hildegard and Edith Stein for answers while trying to look forward in a world of unease brought on by a spiritual crisis of being. And the Black Walnut reminds me in all of that consternation about time and aging that the cosmic dance goes on, ever turning and circling… not linear.

Not about monthly or quarterly trends or resting heart rates… but part of a much larger dance that we are somehow privileged to enjoy for a brief “time” as Humans. We are such stuff as dreams are made on, and our little life is rounded with a sleep. This insubstantial pageant of modernity goes on, and we’ll return to the dust from which we were lovingly made. But heart rates and life (as we consider we know it) itself is a part of the cycle that spins forever and concrescing in little moments of magic that become us.

So, don’t worry about your resting heart rate too much, Sam. The Circle won’t be unbroken:

I danced on a Friday
When the sky turned black 
It’s hard to dance
With the devil on your back.
They buried my body
And they thought I’d gone,
But I am the Dance,
And I still go on.

Dance, then, wherever you may be,
I am the Lord of the Dance, said he,
And I’ll lead you all, wherever you may be,
And I’ll lead you all in the Dance, said he

Tracking a Tree

Back in January, I started tracking a black walnut (juglans nigra) in our backyard as part of coursework in my PhD studies. It seems like an innocuous thing to “track” a “tree,” doesn’t it? Those are in the form of regular audio reflections and pictures I’ve collected here.

The above video is from a snippet of reflections that I put together using Google’s fascinating and important NotebookLM. If there ever was something beneficial that has come from our early explorations with AI, this is definitely one.

Turns out, the practice (ritual?) has been quite transformative for me as a human. Moving from the winter months of little growth and “change” perceptible to us to an onlsaught of green sprouts and leaves emerging day-by-day over the spring and summer to the development of seed pods to now observing the falling leaves (and seed pods) has been an experience outside of our own conceptions of time. From phenomenology to existentialism to Christian ecology, it’s been quite the journey so far.

I hope some of that transformation has in some way contributed to the story of the black walnut that I’ve shared so many insights, tears, prayers, and reflections with over the course of the year.

You can see the images and hear the full audio recordings here at https://samharrelson.com/tracking.

Amazon Warehouses and Leopard Frogs

Incredible statistic here… we are certainly harming our amphibian friends, as evidenced by countless statistics and news stories (salamanders, especially, in the Carolinas), but this reminder of the devastation humans have created and caused in terms of wetland biomes is especially shocking.

We’re still recovering from Hurricane Helene here in the Upstate of South Carolina a year later (the two homes across our street still sit vacant as a daily reminder), but I can’t imagine the human-scale destruction that another Superstorm Sandy-type event would cause the NYC / NJ region, given the lack of wetlands now…

The Endangered Leopard Frog That Lives Next to an NYC Amazon Warehouse – The New York Times (gift article):

Less than 1 percent of the quarter-million acres of freshwater wetlands that once blanketed New York City still exist. City officials have conserved some marshes, but others are on private property, including the 675-acre site where Atlantic Coast leopard frogs often breed. That land had a vast network of creeks before 1929, when the Gulf Oil Corporation started building aboveground petroleum storage tanks to receive oil from ships in the Arthur Kill strait between Staten Island and New Jersey.

Rewiring the Brain with Psilocybin

As part of my studies, I focus on how we as humans internalize and externalize ideas such as ecology or being or intention in general (go read some Owen Barfield if you need a primer on why words matter… start with Unancestral Voice) by looking at the past (medieval but especially ancient). I’m convinced that we’ll eventually look back on this era of classifying natural avenues of therapeautic treatments such as psilocybin as dangerous schedule-1 “drugs” and shake our heads at our naive foolishness in the same way that we wonder how ancient people could have been so “primitive” about ideas (they weren’t!) before the scientific revolution and the Enlightenment movement where so much of our current psychological crises and negative manifestations originate…

Link here is to the archived version (non-paywall):

Just one dose of psilocybin seems to be enough to rewire the brain | New Scientist:

The work suggests it might one day be possible to choose which brain connections to remodel, depending on the mental health condition that is being treated. “Our study hints at an exciting avenue for future research to combine neuromodulation with psychedelics to precisely target specific circuits for neural plasticity,” the researchers wrote in their paper.

Let’s Flood the Planet with Solar Panels

I have very similar thoughts about our growing energy needs and utilizing the very free and abundant (and powerful) resource that is energy being produced by our own star that floods our Earth with more than enough energy potential to get us out of the capitalistic and colonialist matrix that is the fossil fuel industry… a mesh of Whitehead Schedulers powered by solar energy would do wonders to transform the daily lives of humans and more-than-humans here on Earth…

Good read and idea (and stats, espeically out of Pakistan):

A Modest Proposal – by Bill McKibben – The Crucial Years

So let’s start at $2.5 trillion, the number for the panels alone, because, hey, Tik Tok videos. Is that an absurd number to imagine helping to pay? The International Monetary Fund reported recently that the world spends $7 trillion a year subsidizing fossil fuel. And all it gets us is the chance to buy more fossil fuel—the last line of Jacobson’s email makes it clear that even at the full price this would be a huge bargain. You save huge amounts of money because you don’t have to pay for fuel any more. Once the panels are up, sunshine is free. It changes everything.

Religion and Ecology Podcast

Great episode from Yale’s Forum on Religion and Ecology Spotlights podcast… enjoyed the discussion of Plotinus (always!), spirituality vs religious as well as some of the background on why we do what we do in this fascinating sphere of Religion and Ecology (plus, the host Dr. Sam Mickey is also a graduate of my program at CIIS):

5.21 Rachael Petersen on Matter, Meaning, and Mind:

This episode features Rachael Petersen, a writer, thinker, and convener. We discuss her life and work at the confluence of philosophy, ecology, and transcendence. As Program Lead of Harvard’s Thinking with Plants and Fungi Initiative, Rachael guides interdisciplinary explorations into how cutting-edge plant science challenges our ideas of mind, matter, and meaning. She holds a Master of Divinity from Harvard Divinity School, where her research centered on panpsychism, pantheism, and the more-than-human world, with a special focus on German philosophy.