Peace is the work of justice indirectly, in so far as justice removes the obstacles to peace; but it is the work of charity (love) directly, since charity, according to its very notion, causes peace.

There must be must be a first mover existing above all – and this we call God.

If there were some solitary or feral man, the passions of the soul would be sufficient for him; by them he would be conformed to things in order that he might have knowledge of them. But because man is naturally political and social, there is need for one man to make his conceptions known to others, which is done with speech. So significant speech was needed if men were to live together. Which is why those of different tongues do not easily live together.

If the highest aim of a captain were to preserve his ship, he would keep it in port forever.

Clearly the person who accepts the Church as an infallible guide will believe whatever the Church teaches.

God himself would not permit evil in this world if good did not come of it for the benefit and harmony of the universe.

Reason in man is rather like God in the world.