The divisions of science are not like different lines that meet in one angle, but rather like the branches of trees that join in one trunk.

For what a man would like to be true, that he more readily believes.

I do not believe that any man fears to be dead, but only the stroke of death.

For knowledge, too, is itself power.

Let every student of nature take this as his rule, that whatever the mind seizes upon with particular satisfaction is to be held in suspicion.

Certainly man is of kin to the beasts by his body; and if he be not kin to God by his spirit, he is a base and ignoble creature.

For whatever deserves to exist deserves also to be known, for knowledge is the image of existence, and things mean and splendid exist alike.