I used unexpectedly to experience a consciousness of the presence of God, or such a kind that I could not possibly doubt that He was within me or that I was wholly engulfed in Him. This was in no sense a vision: I believe it is called mystical theology. The soul is suspended in such a way that it seems to be completely outside itself. The will loves; the memory, I think, is almost lost; while the understanding, I believe, thought it is not lost, does not reason—I mean that it does not work, but is amazed at the extent of all it can understand; for God wills it to realize that it understands nothing of what His Majesty represents to it.
Teresa of Ávila, The Life of Saint Teresa of Ávila by Herself
chapter-xxiii, mystical-theology, mysticism, prayer