Those are weaklings who know the truth and uphold it as long as it suits their purpose, and then abandon it.

To scorn philosophy is truly to philosophize.

When we do not know the truth of a thing, it is good that there should exist a common error which determines the mind of man, as, for example, the moon, to which is attributed the change of seasons, the progress of diseases, etc. For the chief malady of man is a restless curiosity about things which he cannot understand; and it is not so bad for him to be in error as to be curious to no purpose.

The mind of the greatest man on earth is not so independent of circumstances as not to feel inconvenienced by the merest buzzing noise about him; it does not need the report of a cannon to disturb his thoughts. The creaking of a vane or a pully is quite enough. Do not wonder that he reasons ill just now; a fly is buzzing by his ear; it is quite enough to unfit him for giving good counsel.

The struggle alone pleases us, not the victory.

All of our reasoning ends in surrender to feeling.

Curiosity is only vanity. We usually only want to know something so that we can talk about it.