A song is the exultation of the mind dwelling on eternal things, bursting forth in the voice.

Eternity is called whole, not because it has parts, but because it is lacking in nothing.

Art is right reason in the doing of work.

Because philosophy arises from awe, a philosopher is bound in his way to be a lover of myths and poetic fables. Poets and philosophers are alike in being big with wonder.

Mistakes are made on two counts: an argument is either based on error or incorrectly developed.

If all the sins of the flesh are worthy of condemnation because by them man allows himself to be dominated by that which he has of the animal nature, much more deserving of condemnation are the sins against nature by which man degrades his own animal nature.

If... the motion of the earth were circular, it would be violent and contrary to nature, and could not be eternal, since ... nothing violent is eternal .... It follows, therefore, that the earth is not moved with a circular motion.