The chief business of seventeenth-century philosophy was to reckon with seventeenth-century science... the chief business of twentieth-century philosophy is to reckon with twentieth-century history.

The history of thought, and therefore all history, is the re-enactment of past thought in the historian's own mind.

Perfect Freedom is reserved for the man who lives by his own work, and in that work does what he wants to do.

Every new generation must rewrite history in its own way.

Like other revolutionaries I can thank God for the reactionaries. They clarify the issue.

A man ceases to be a beginner in any given science and becomes a master in that science when he has learned that... he is going to be a beginner all his life.

The children of each generation are taught to want what they are taught they must not have.