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.

It is a sin to regard the fact that God cannot do the impossible as a limitation on his powers.

I receive Thee ransom of my soul. For love of Thee have I studied and kept vigil toiled preached and taught.

It would seem that the ingratitude, whereby a subsequent sin causes the return of sins previously forgiven, is a special sin. For, the giving of thanks belongs to counter passion, which is a necessary condition of justice. But justice is a special virtue. Therefore this ingratitude is a special sin. Thanksgiving is a special virtue. But ingratitude is opposed to thanksgiving. Therefore ingratitude is a special sin.

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

Distinctions drawn by the mind are not necessarily equivalent to distinctions in reality.

To teach in order to lead others to faith is the task of every preacher and of each believer.