O livrinho branco e cinza

A anatomia do compromisso

A principle is "a fundamental, primary, or general truth, on which other
truths depend." Thus a principle is an abstraction which subsumes a great
number of concretes. It is only by means of principles that one can set one's
long-range goals and evaluate the concrete alternatives of any given moment. It
is only principles that enable a man to plan his future and to achieve it.

(p. 144, Cap 14, Jan 1964)