The concept of number is the obvious distinction between the beast and man. Thanks to number, the cry becomes a song, noise acquires rhythm, the spring is transformed into a dance, force becomes dynamic, and outlines figures.

Man in general, if reduced to himself, is too wicked to be free.

There is no easy method of learning difficult things. The method is to close the door, give out that you are not at home, and work.

There is no philosophy without the art of ignoring objections.

False opinions are like false money, struck first of all by guilty men and thereafter circulated by honest people who perpetuate the crime without knowing what they are doing.

A constitution that is made for all nations is made for none.

All pain is a punishment, and every punishment is inflicted for love as much as for justice.