“The tree which moves some to tears of joy is in the eyes of others only a green thing which stands in the way,” William Blake wrote in his most beautiful letter. “As a man is, so he sees.” Walt Whitman saw trees as the wisest of teachers; Hermann Hesse as our mightiest consolation for mortality. Wangari Maathai rooted in them a colossal act of resistance that earned her the Nobel Peace Prize. Poets have elegized their wisdom, artists have drawn from their form resonance with our human emotions, scientists are only just beginning to uncover their own secret language.

Robert Macfarlane — a rare enchanter who entwines the scientific and the poetic in his lyrical explorations of the natural world — offers a crowning curio in the canon of wisdom on human life drawn from trees in a passage from Underland: A Deep Time Journey (public library) — his magnificent soul-guided, science-lit tour of the hidden universe beneath our feet.

Macfarlane writes:

Lying there among the trees, despite a learned wariness towards anthropomorphism, I find it hard not to imagine these arboreal relations in terms of tenderness, generosity and even love: the respectful distance of their shy crowns, the kissing branches that have pleached with one another, the unseen connections forged by root and hyphae between seemingly distant trees. I remember something Louis de Bernières has written about a relationship that endured into old age: “we had roots that grew towards each other underground, and when all the pretty blossom had fallen from our branches we found that we were one tree and not two.” As someone lucky to live in a long love, I recognize that gradual growing-towards and subterranean intertwining; the things that do not need to be said between us, the unspoken communication which can sometimes tilt troublingly towards silence, and the sharing of both happiness and pain. I think of good love as something that roots, not rots, over time, and of the hyphae that are weaving through the ground below me, reaching out through the soil in search of mergings. Theirs, too, seems to me then a version of love’s work.

Beneath the canopy, Macfarlane marvels at the slim contour of empty space around each tree’s crown — a phenomenon known as crown shyness, “whereby individual forest trees respect each other’s space, leaving slender running gaps between the end of one tree’s outermost leaves and the start of another’s.”

In this, too, I see a poignant lesson in love, evocative of Rilke and what may be the greatest relationship advice ever committed to words: “I hold this to be the highest task of a bond between two people: that each should stand guard over the solitude of the other.”

Couple this tiny fragment of the sweepingly wondrous Underland with Amanda Palmer’s lovely reading of Mary Oliver’s poem “When I Am Among the Trees,” then revisit Kahlil Gibran on the difficult balance of intimacy and independence in love.