Scepticism is the first step towards truth.

Instinct guides the animal better than the man. In the animal it is pure, in man it is led astray by his reason and intelligence.

The first promise exchanged by two beings of flesh was at the foot of a rock that was crumbling into dust; they took as witness for their constancy a sky that is not the same for a single instant; everything changed in them and around them, and they believed their hearts free of vicissitudes. O children! always children!

We swallow with one gulp the lie that flatters us, and drink drop by drop the truth which is bitter to us.

My friend, you should blow out your candle in order to find your way more clearly.

The bad gives rise to the good, the good inspires the better, the better produces the excellent, the excellent is followed by the bizarre

The good of the people must be the great purpose of government. By the laws of nature and of reason, the governors are invested with power to that end. And the greatest good of the people is liberty. It is to the state what health is to the individual.