An acknowledgment of the full spectrum of consciousness would profoundly alter the course of every one of the modern disciplines it touches — and that, of course, is an essential aspect of integral studies... A full-spectrum approach to human consciousness and behavior means that men and women have available to them a spectrum of knowing — a spectrum that includes, at the very least, the eye of flesh, the eye of mind, and the eye of spirit.

The Eye of Spirit : An Integral Vision for a World Gone Slightly Mad (1997)