“What is liberal education,” p. 5 [The phrase “specialists without spirit or vision and voluptuaries without heart.” is from Max Weber]
Liberalism Ancient and Modern (1968)

“Nietzsche is never boring. He is always interesting, exciting, thrilling, glittering, breathtaking. He possesses a kind of brilliance and tempo which I believe was unknown in former times.”

Leo Strauss

Seminar on Nietzsche's Beyond Good and Evil (1971–1972)

“We believe that failing to call a spade a spade is not scientific.”

Leo Strauss book Thoughts on Machiavelli

Source: Thoughts on Machiavelli (1958), p. 50

“An exoteric book contains then two teachings: a popular teaching of an edifying character, which is in the foreground; and a philosophic teaching concerning the most important subject, which is indicated only between the lines.”

Leo Strauss book Persecution and the Art of Writing

Source: Persecution and the Art of Writing (1952), Persecution and the Art of Writing, p. 36

“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.”

Leo Strauss

Source: What is Political Philosophy (1959), p. 77

“To avert the danger [posed by theory] to life, Nietzsche could choose one of two ways: he could insist on the strictly esoteric character of the theoretical analysis of life—that is, restore the Platonic notion of the noble delusion—or else he could deny the possibility of theory proper and so conceive of thought as essentially subservient to, or dependent on, life or fate… If not Nietzsche himself, at any rate his successors [Heidegger] adopted the second alternative.”

Leo Strauss

Source: Natural Right and History (1953), p. 26

“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.”

Leo Strauss

Source: Natural Right and History (1953), p. 31

“Liberal education, which consists in the constant intercourse with the greatest minds, is a training in the highest form of modesty. … It is at the same time a training in boldness. … It demands from us the boldness implied in the resolve to regard the accepted views as mere opinions, or to regard the average opinions as extreme opinions which are at least as likely to be wrong as the most strange or least popular opinions”

Leo Strauss

“What is liberal education,” p. 8
Liberalism Ancient and Modern (1968)

“In order to see the relation between philosophy as rigorous science and the alternative to it clearly, one must look at the political conflict between the two antagonists, i. e. at the essential character of that conflict.”

Leo Strauss

Philosophy as Rigorous Science and Political Philosophy (1971)

““Our ideas” are only partly our ideas. Most of our ideas are abbreviations or residues of the thought of other people, of our teachers (in the broadest sense of the term) and of our teachers’ teachers; they are abbreviations and residues of the thought of the past. These thoughts were once explicit and in the center of consideration and discussion. It may even be presumed that they were once perfectly lucid. By being transmitted to later generations they have possibly been transformed, and there is no certainty that the transformation was effected consciously and with full clarity. … This means that the clarification of our political ideas insensibly changes into and becomes indistinguishable from the history of political ideas.”

Leo Strauss

Source: What is Political Philosophy (1959), p. 73

“Society did not recognize philosophy or the right of philosophizing. There was no harmony between philosophy and society. The philosophers were very far from being exponents of society or of parties. They defended the interests of philosophy and of nothing else. In doing this, they believed indeed that they were defending the highest interests of mankind. The exoteric teaching was needed for protecting philosophy. It was the armor in which philosophy had to appear. It was needed for political reasons. It was the form in which philosophy became visible to the political community. It was the political aspect of philosophy. It was "political" philosophy.”

Leo Strauss book Persecution and the Art of Writing

Persecution and the Art of Writing (1952), Introduction

“[The philosopher] is ultimately compelled to transcend not merely the dimensions of common opinion, of political opinion, but the dimension of political life as such; for he is left to realize that the ultimate aim of political life cannot be reached by political life, but only by a life devoted to contemplation, to philosophy.”

Leo Strauss

Source: What is Political Philosophy (1959), p. 91

“Philosophizing means, then, to ascend from public dogma to essentially private knowledge.”

Leo Strauss

Source: Natural Right and History (1953), p. 12

“The Euthyphron then gives us a two-fold presentation of piety. First, a discussion of what piety is. Secondly, a presentation of the problem of Socrates' piety.”

Leo Strauss

An Untitled Lecture on Plato's Euthyphron (1996)