States of ConsciousnessStates of Consciousness, a classic by world authority Charles T. Tart, is a basic understanding of how the mind is a dynamic, culturally biased, semi arbitrary construction and system. A systematic exploration of how and why altered states can come about and their possibilities. As a student of his remarked, For the first weeks of class I didn't understand what those diagrams were about, but I've realized the book is all about the way my own mind