“Experience constantly proves that every man who has power is impelled to abuse it; he goes on till he is pulled up by some limits. Who would say it! virtue even has need of limits.”

Laws undertake to punish only overt acts.

Although born in a prosperous realm, we did not believe that its boundaries should limit our knowledge, and that the lore of the East should alone enlighten us.

The English are busy folk; they have no time in which to be polite.

The prejudices of superstition are superior to all others, and have the strongest influence on the human mind.

When God endowed human beings with brains, He did not intend to guarantee them.

Friendship is a contract in which we render small services in expectation of big ones.

It is not the young people that degenerate; they are not spoiled till those of mature age are already sunk into corruption.

The less men think, the more they talk.

Political liberty in a citizen is that tranquillity of spirit which comes from the opinion each one has of his security, and in order for him to have this liberty the government must be such that one citizen cannot fear another citizen.

A fondness for reading changes the inevitable dull hours of our life into exquisite hours of delight.

The spirit of commerce… renders every man willing to live on his own property…& prevents the growth of luxury.

Society is the union of men and not the men themselves.

What unhappy beings men are! They constantly waver between false hopes and silly fears, and instead of relying on reason they create monsters to frighten themselves with, and phantoms which lead them astray.

With truths of a certain kind, it is not enough to make them appear convincing: one must also make them felt. Of such kind are moral truths.

In the state of nature… all men are born equal, but they cannot continue in this equality. Society makes them lose it, and they recover it only by the protection of the law.

Men should be bewailed at their birth, and not at their death.