Heracleitus Socrates Plato Aristotle St. Augustine Niccolo Machiavelli Baruch Spinoza Thomas Hobbes John Locke Jean-Jacques Rousseau Adam Smith Immanuel Kant G.W.F. Hegel Thomas Jefferson Alexis de Tocqueville Karl Marx Friedrich Nietzsche John Dewey Hannah Arendt Max Horkheimer Michel Foucault John Rawls Ronald Dworkin Noam Chomsky

“Travel and change of place import new vigor to the mind.”


“Love is pleasure accompanied by the idea of an external cause, and hatred pain accompanied by the idea of an external cause.”

Baruch Spinoza

“Whereof one cannot speak thereof one must be silent.”

Ludwig Wittgenstein

“Wisdom begins with wonder.”


“Tries and fields tell me nothing: men are my teachers.”


“Cogito ergo sum. I think, therefore I am.”

Rene Descartes

“Once spirit was God, then it became man, and now it is even becoming mob.”

Friedrich Nietzsche

“You cannot open a book without learning something.”


“Advice to intellectuals: let no – one represent you.”

Theodor Adorno

“All men, by nature, desire to know.”