The opportunity for doing mischief is found a hundred times a day, and of doing good once in a year.

So it is the human condition that to wish for the greatness of one's fatherland is to wish evil to one's neighbors. The citizen of the universe would be the man who wishes his country never to be either greater or smaller, richer or poorer.

God gave us the gift of life; it is up to us to give ourselves the gift of living well.

I believe that there never was a creator of a philosophical system who did not confess at the end of his life that he had wasted his time. It must be admitted that the inventors of the mechanical arts have been much more useful to men that the inventors of syllogisms. He who imagined a ship towers considerably above him who imagined innate ideas.

We must distinguish between speaking to deceive and being silent to be reserved.

What is tolerance? It is the consequence of humanity. We are all formed of frailty and error; let us pardon reciprocally each other's folly - that is the first law of nature.

Before receiving your instruction, I must tell you what happened to me one day. I had just had a closet built at the end of my garden. I heard a mole arguing with a cockchafer; 'Here's a fine structure,' said the mole, 'it must have been a very powerful mole who did this work.' 'You're joking,' said the cockchafer; 'it's a cockchafer full of genius who is the architect of this building.' From that moment I resolved never to argue.