A great first Wilber book.

Easy to read  and a lot of fun. 

This and Kosmic Consciousness are great ways to introduce yourself to Wilber! 

Direct experience decisively answers the nagging questions inherent in faith. There are usually two phases of direct experience; peak experiences and plateau experiences.

Peak experiences are relatively brief, usually intense, often unbidden, and frequently life-changing. They are actually “peak experiences” into the transpersonal, supramental levels of one's own higher potentials. Psychic peak experiences are a glimpse into nature mysticism (gross-level oneness); subtle peak experiences are a glimpse into deity mysticism (subtle-level oneness); casual peak experiences are a glimpse into emptiness (casual-level oneness); and nondual peak experiences are a glimpse into One Taste. As Roger Walsh has pointed out, the higher the level of the peak experience, the rarer it is… .

Whereas peak experiences are usually of brief duration—a few minutes to a few hours—plateau experiences are more constant and enduring, verging on becoming a permanent adaptation. Whereas peak experiences can, and usually do, come spontaneously, in order to sustain them and turn them from a peak into a plateau—from a brief altered state into a more enduring trait—prolonged practice is required. Whereas almost anybody, at any time, at any age, can have a brief peak experience, I know of few bona fide cases of plateau experiences that did not involve years of sustained spiritual practice.

The nondual universe of One Taste arises as a spontaneous gesture of your own true nature.