The most damaging prejudice consists of banning any kind of investigation of nature.

All perishable is but an allegory.

It is in human nature to relax, when not compelled by personal advantage or disadvantage.

There is a courtesy of the heart; it is allied to love. From its springs the purest courtesy in the outward behavior.

Art is long, life is short; judgement difficult, opportunity transient.

Men show their character in nothing more clearly than what they think laughable.

One never goes so far as when one doesn't know where one is going.