The first step towards philosophy is incredulity.
The God of the Christians is a father who makes much of his apples, and very little of his children.
The possibility of divorce renders both marriage partners stricter in their observance of the duties they owe to each other. Divorces help to improve morals and to increase the population.
You have to make it happen.
People praise virtue, but they hate it, they run away from it. It freezes you to death, and in this world you've got to keep your feet warm.
The best mannered people make the most absurd lovers.
Patriotism is an ephemeral motive that scarcely ever outlasts the particular threat to society that aroused it.
The decisions of law courts should never be printed: in the long run, they form a counter authority to the law.
There are three principal means of acquiring knowledge... observation of nature, reflection, and experimentation. Observation collects facts; reflection combines them; experimentation verifies the result of that combination.