Nor is it enough to toughen up his soul; you must also toughen up his muscles.

I see several animals that live so entire and perfect a life, some without sight, others without hearing: who knows whether to us also one, two, or three, or many other senses, may not be wanting?

In my opinion, the most fruitful and natural play of the mind is conversation. I find it sweeter than any other action in life; and if I were forced to choose, I think I would rather lose my sight than my hearing and voice. The study of books is a drowsy and feeble exercise which does not warm you up.

I write to keep from going mad from the contradictions I find among mankind - and to work some of those contradictions out for myself.

We have the pleasures suitable to our lot; let us not usurp those of greatness. Ours are more natural and all the more solid and sure for being humbler. Since we will not do so out of conscience, at least out of ambition let us reject ambition.

How many condemnations I have witnessed more criminal than the crime!

Oh, a friend! How true is that old saying, that the enjoyment of one is sweeter and more necessary than that of the elements of water and fire!