"All men by nature desire knowledge." - Aristotle

"Liberties ... depend on the silence of the law." - Thomas Hobbes

"Everything I have written seems like straw by comparison with what I have seen and what has been revealed to me." - St. Thomas Aquinas

"Men should be either treated generously or destroyed, because they take revenge for slight injuries - for heavy ones they cannot." - Niccolò Machiavelli

"We should therefore claim, in the name of tolerance, the right not to tolerate the intolerant." - Karl Popper

"In questions of science the authority of a thousand is not worth the humble reasoning of a single individual." - Galileo Galilei

"Anatomy is destiny." - Sigmund Freud

"It is better to be a human being dissatisfied than a pig satisfied; better to be Socrates dissatisfied than a fool satisfied." - John Stuart Mill

"The end of law is, not to abolish or restrain, but to preserve and enlarge freedom." - John Locke

Summum bonum. ("The highest good.") - Cicero

"There is no hope without fear, and no fear without hope." - Baruch Spinoza

"If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties." - Francis Bacon

"If I have seen further it is by standing on the shoulders of giants." - Isaac Newton

"Truth is not by nature free - nor error servile - its production is thoroughly imbued with relations of power." - Michel Foucault

Je pense, donc je suis. ("I think, therefore I am") - René Descartes

"Nothing happens to anybody which he is not fitted by nature to bear." - Marcus Aurelius

"Religion is the sigh of the oppressed creature, the heart of a heartless world. ...It is the opium of the people." - Karl Marx

"God is dead: but considering the state the species Man is in, there will perhaps be caves, for ages yet, in which his shadow will be shown." - Friedrich Nietzsche

"With love for mankind and hatred of sins." - St. Augustine

"It is not from the benevolence of the butcher, the brewer, or the baker, that we expect our dinner, but from their regard to their own interest." - Adam Smith

"Man was born free, and everywhere he is in chains." - Jean-Jacques Rousseau

"The unexamined life is not worth living." - Plato