Such studies as my books deal with may seem profitless to those unacquainted with their practical value. More than five thousand years ago the most famous of Indian sages pointed out: "Even a little of this yoga practice saves from great dangers." Quite clearly he did not refer to the common yoga but to the philosophic one, for the utter inability of most Indian yogis to save their own country is obvious to every critical observer.
-- Notebooks Category 20: What Is Philosophy? > Chapter 1: Toward Defining Philosophy > # 166