We feel and know that we are eternal.

The world would be happier if men had the same capacity to be silent that they have to speak.

Superstition, then, is engendered, preserved, and fostered by fear.

The idea, which constitutes the actual being of the human mind, is not simple, but compounded of a great number of ideas.

The highest activity a human being can attain is learning for understanding, because to understand is to be free.

He who regulates everything by laws, is more likely to arouse vices than reform them.

. . . to know the order of nature, and regard the universe as orderly is the highest function of the mind.