Man cannot live without joy; therefore when he is deprived of true spiritual joys it is necessary that he become addicted to carnal pleasures

A man has free choice to the extent that he is rational.

Three things are necessary for the salvation of man: to know what he ought to believe; to know what he ought to desire; and to know what he ought to do.

Beware the man of one book.

Reason in man is rather like God in the world

Justice is a certain rectitude of mind whereby a man does what he ought to do in the circumstances confronting him