Walt Whitman once observed that animals "do not sweat and whine about their condition" and "do not lie awake in the dark and weep for their sins", a pointed contrast to humans, who possess souls that drive our art, our love, and our endless questioning of meaning. The very word "animal" comes from the Latin for soul, yet for centuries we have denied this quality to every creature but ourselves. Even as modern science has reluctantly acknowledged that other animals possess consciousness and inner lives, we have stubbornly clung to the notion that the soul belongs to humans alone. Yet defining the soul itself proves nearly impossible. Carl Jung recognized that "the soul is partly in eternity and partly in time," while Virginia Woolf observed that "one can't write directly about the soul. Looked at, it vanishes." The soul resists measurement and explanation, existing in the gap between what we can measure with fMRI machines and EEG equipment and what we intuit about the depths of consciousness and feeling.

In 1991, long before researchers would use brain-imaging technology to reveal that birds dream and demonstrate the problem-solving abilities of octopuses, parish minister Gary Kowalski published "The Souls of Animals," a groundbreaking inquiry into the spiritual lives of whooping cranes, elephants, jackdaws, gorillas, songbirds, horses, dogs, and cats. Kowalski, whose vocation involved praying with the dying and helping people navigate moral questions, approached the question not as a scientist but as a spiritual practitioner asking whether creatures other than humans possess what he called spirituality. He defined spirituality broadly as "the development of a moral sense, the appreciation of beauty, the capacity for creativity, and the awareness of one's self within a larger universe as well as a sense of mystery and wonder about it all." This definition echoes ancient cosmologies from Kepler, who believed the Earth itself was an ensouled body, and from indigenous cultures worldwide that have long understood other animals as sources of wisdom and carriers of sacred meaning.

Kowalski's conception of the soul moved beyond religious doctrine to something more fundamental to existence itself. For ancient peoples, he notes, the soul resided in the breath or blood. For him, soul "resides at the point where our lives intersect with the timeless, in our love of goodness, our passion for beauty, our quest for meaning and truth." He describes soul as "the magic of life," "the marrow of our existence as sentient, sensitive beings," and "the element of personality" that appears in great works of art, in moments of awe beneath a starlit sky, and in the depths of soulful music. Soul appears whenever our lives touch the dimension of the holy: in intimate moments, in flights of imagination, and in rituals that transform fleeting events into enduring significance. When we speak of the soul of a nation, Kowalski reminds us, we mean its capacity for courage and visionary change, capacities we have long recognized in humans but rarely considered in the animals around us.

The denial of animal souls, Kowalski argues, stems not from evidence but from the failure of our tools of communication and computation to access the inner lives of other creatures. We have lacked the ability to prove that animals possess imagination, play, love, grief, dreams, and wonder, so we have simply denied these things existed. Yet contemporary neuroscience has begun to pierce this veil. Studies now reveal that birds do indeed dream, even experiencing specific dream content. Octopuses demonstrate intelligence and problem-solving that defies easy explanation. Elephants mourn their dead and recognize themselves in mirrors. Dogs form deep bonds with humans. Gorillas express preferences, fears, and apparent joy. The evidence mounts that we share with other animals not just biological machinery but something of the inner life we have long reserved for ourselves alone.

This matters profoundly because denying souls to animals has allowed us to exploit them without moral reckoning. If we begin to acknowledge that a crane, an elephant, a horse, or a dog possesses not merely consciousness but something we might call spirituality, an awareness of beauty, a capacity for meaning-making, a sense of wonder, then our moral relationship to these creatures must change. The question "Do animals have souls?" becomes inseparable from the question "How should we live with them?" By recognizing soul in other animals, we do not diminish the human but rather expand our understanding of what soul means and where it appears in the living world.