Mystical experience transcends all religions and cultures, though each mystic tends to describe his experiences in the jargon of his particular religion or culture. But the sense of the unity of all things, the heart of the mystical experience, is not confined to followers of specific religions, and peak experiences of a spiritual nature can come unbidden to people who neither seek nor cultivate them.

From James Hewitt’s The Complete Yoga Book: The Yoga of Breathing, Meditation, and Postures, London: Rider, 1991 (first published in 1977), p. 375.