The Perennial Philosophy is ...

The Perennial Philosophy is expressed most succinctly in the Sanskrit formula, tat tvam asi (\'That art thou\'); the Atman, or immanent eternal Self, is one with Brahman, the Absolute Principle of all existence; and the last end of every human being, is to discover the fact for himself, to find out who he really is.
The Perennial Philosophy is expressed most succinctly in the Sanskrit formula, tat tvam asi ('That art thou'); the Atman, or immanent eternal Self, is one with Brahman, the Absolute Principle of all existence; and the last end of every human being, is to discover the fact for himself, to find out who he really is.

Quotes from the same author

Experience is not what happens to you; it's what you do with what happens to you.
Experience is not what happens to a man. It is what a man does with what happens to him.
There is only one corner of the universe you can be certain of improving, and that's your own self.
Technological progress has merely provided us with more efficient means for going backwards.
No man ever dared to manifest his boredom so insolently as does a Siamese tomcat when he yawns in the face of his amorously importunate wife.