For millions of people, the strongest evidence for their faith isn’t an argument. It’s an experience: a moment of transcendence, a felt presence, an encounter with something vast and loving. These experiences are real. They happen, they’re powerful, and they change lives. We’re not going to pretend otherwise.
Here’s the puzzle: people in every religion have them, with equal intensity, and each person’s experience confirms their own tradition. Spiritual experience doesn’t point toward one religion. It points in every direction at once. Look at who reports these encounters:
Teresa of Avila described being pierced by divine love so intensely she could locate the experience in her body. John of the Cross wrote of the soul’s union with God. Centuries of Christian contemplatives report direct, unmistakable encounters with Christ’s presence. For them, the experience settles the question: God is real, and he is the God of Christianity.
Sufism, Islam’s mystical tradition, uses chanted remembrance of God (dhikr), meditation, and in some orders whirling dance to reach states where the self seems to dissolve into the divine. Rumi’s poetry comes from this tradition. Sufis describe the same overwhelming certainty the Christian mystics describe, and it confirms for them that Allah is one and Muhammad is his messenger.
Hindu yogic traditions aim at directly experiencing Brahman, the ultimate reality behind appearances, and practitioners report exactly that: the boundary between self and everything else falling away. Buddhist meditators in Zen and Tibetan traditions reach states of profound clarity that they experience as direct insight into the empty, selfless nature of mind. Same depth of experience, opposite conclusions: the Hindu finds an eternal universal Self, the Buddhist finds no self at all.
For over a thousand years, Greeks climbed the slopes of Mount Parnassus to consult the Pythia, the priestess through whom Apollo spoke. Seekers came away shaken, awed, convinced they had brushed against the divine. Kings planned wars around what happened in that chamber. The experiences were as vivid and life-changing as anything reported in a modern church or mosque. Today, essentially everyone agrees Apollo wasn’t there.
The Experience and the Interpretation Are Two Different Things
Notice what’s constant and what varies. The raw experience, the sense of vastness, dissolving boundaries, overwhelming meaning, shows up everywhere humans meditate, pray, chant, fast, or dance. What varies is the label. A Christian in that state meets Christ. A Sufi meets Allah. A yogi meets Brahman. A Buddhist sees through the illusion of self. The meaning isn’t delivered by the experience; it’s supplied by whatever the person already believed walking in.
William James noticed this over a century ago in The Varieties of Religious Experience: mystical states across cultures share the same core features, while the theology attached to them is local. Modern neuroscience has extended the point. Contemplative states can be observed in the brain, trained through practice, and reached by people of any belief system or none. We walk through that evidence on What’s Happening in a Praying Brain?
The Strongest Version of the Believer’s Case
Philosophers like William Alston and Richard Swinburne have made a serious argument here: we normally trust our experiences unless we have a reason not to. If seeming to see a tree justifies believing there’s a tree, shouldn’t seeming to experience God justify believing in God? That principle, sometimes called the principle of credulity, is reasonable on its face.
But there’s a built-in exception, and everyone accepts it: we stop trusting an experience when it conflicts with other experiences of the same thing. If ten witnesses describe the same car crash ten incompatible ways, we don’t pick one to trust. We conclude something is distorting the reports. Religious experience is exactly that situation. The Christian’s experience says the soul is eternal; the Buddhist’s equally vivid experience says there is no soul. They can’t both be perceiving the same reality accurately. The conflict doesn’t prove nobody is perceiving anything. It does mean the experiences, taken together, can’t tell us who’s right, which is the one job the argument needed them to do.
What Would We Expect to See?
If spiritual experiences were genuine contact with one true divine reality, we’d expect them to converge: mystics from every culture coming back with the same report, the way travelers to the same country describe the same landmarks. Independent witnesses agreeing is exactly how we confirm that something real is out there.
If instead these are powerful states the human brain can produce, interpreted through whatever framework the person already holds, we’d expect vivid experiences everywhere, confirming every theology at once, including theologies that contradict each other, and including ones like Apollo’s that everyone now agrees were mistaken. That’s the world we live in. The experiences are real. The question they can’t answer is which, if any, of the interpretations is true. And the interpretations can’t all be right.
Want to Go Deeper?
- William James, The Varieties of Religious Experience (the classic study, still readable and fair)
- Britannica: mysticism, for the cross-cultural picture
- What’s Happening in a Praying Brain? on this site, for the neuroscience
- William Alston, Perceiving God (the strongest philosophical defense of religious experience as evidence)