To despise theory is to have the excessively vain pretension to do without knowing what one does, and to speak without knowing what one says.

Nature is never so admired as when she is understood.

Hardly anyone knows how much is gained by ignoring the future.

Since the princes take the Earth for their own, it's fair that the philosophers reserve the sky for themselves and rule there, but they should never permit the entry of others.

A man finds no sweeter voice in all the world than that which chants his praise.

It is beauty that begins to please, and tenderness that completes the cbarm.

In vain we shall penetrate more and more deeply the secrets of the structure of the human body, we shall not dupe nature; we shall die as usual.