Men and women, as the Christian mystics are fond of saying, have (at least) three eyes of knowing: the eye of flesh, which apprehends physical events; the eye of the mind, which apprehends images and desires and concepts and ideas; and the eye of contemplation, which apprehends spiritual experiences and states. And that, of course, is a simplified version of the spectrum of consciousness, reaching from body to mind to spirit.

Ken Wilber, The Eye of Spirit