Life is too short to live with any but the greatest books.

When speaking of a "body of knowledge" or of "the results of research," e.g., we tacitly assign the same cognitive status to inherited knowledge and to independently acquired knowledge. To counteract this tendency a special effort is required to transform inherited knowledge into genuine knowledge by revitalizing its original discovery, and to discriminate between the genuine and the spurious elements of what claims to be inherited knowledge.

Nothing ought to be said or done which could create the impression that unbiased reconsideration of the most elementary premises of philosophy is a merely academic or historical affair.

The belief that value judgments are not subject, in the last analysis, to rational control, encourages the inclination to make irresponsible assertions regarding right and wrong or good and bad. One evades discussion of serious issues by the simple device of passing them off as value problems, whereas, to say the least, many of these conflicts arose out of man's very agreement regarding values.

By realizing that we are ignorant of the most important things, we realize at the same time that the most important thing for us, or the one thing needful, is quest for knowledge of the most important things or quest for wisdom.

The silence of a wise man is always meaningful.

The adjective "political" in "political philosophy" designates not so much the subject matter as a manner of treatment; from this point of view, I say, "political philosophy" means primarily not the philosophic study of politics, but the political, or popular, treatment of philosophy, or the political introduction to philosophy the attempt to lead qualified citizens, or rather their qualified sons, from the political life to the philosophic life.