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.

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

I feel nothing, apart from a certain difficulty in continuing to exist.

Nature is never so admired as when she is understood.

We must always skim over pleasures. They are like marshy lands that we must travel nimbly, hardly daring to put down our feet.

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.

If I held all the thoughts of the world in my hand, I would be careful not to open it.