Rarely affirm, seldom deny, always distinguish.

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.

The celestial bodies are the cause of all that takes place in the sublunar world.

Moral science is better occupied when treating of friendship than of justice.

The knowledge of God is the cause of things. For the knowledge of God is to all creatures what the knowledge of the artificer is to things made by his art.

If, then, you are looking for the way by which you should go, take Christ, because He Himself is the way.

The blessed in the kingdom of heaven will see the punishments of the damned, in order that their bliss be more delightful for them.