It is not enough to have a good mind; the main thing is to use it well.

I think, therefore I am.

The reading of all good books is like conversation with the finest men of past centuries.

Common sense is the most fairly distributed thing in the world, for each one thinks he is so well-endowed with it that even those who are hardest to satisfy in all other matters are not in the habit of desiring more of it than they already have.

The greatest spirits are capable of the greatest vices as well as of the greatest virtues.

Illusory joy is often worth more than genuine sorrow.

There is nothing so strange and so unbelievable that it has not been said by one philosopher or another.