Nothing great ever happened without enthusiasm.

Whenever a true theory appears, it will be its own evidence. Its test is, that it will explain all phenomena.

Pride is handsome, economical; pride eradicates so many vices, letting none subsist but itself, that it seems as if it were a great gain to exchange vanity for pride.

All life is an experiment.

The whole world is an omen and a sign. Why look so wistfully in a corner? Man is the Image of God. Why run after a ghost or a dream? The voice of divination resounds everywhere and runs to waste unheard, unregarded, as the mountains echo with the bleatings of cattle.

A man is known by the books he reads.

Deep insight will always, like Nature, ultimate its thought in a thing.