True virtue is life under the direction of reason.

He alone is free who lives with free consent under the entire guidance of reason.

Whatsoever is, is in God, and without God nothing can be, or be conceived.

I would warn you that I do not attribute to nature either beauty or deformity, order or confusion. Only in relation to our imagination can things be called beautiful or ugly, well-ordered or confused.

Men govern nothing with more difficulty than their tongues, and can moderate their desires more than their words.

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

Reality and perfection are synonymous.