If a thing can be done adequately by means of one, it is superfluous to do it by means of several; for we observe that nature does not employ two instruments [if] one suffices.

A person is disposed to an act of choice by an angel ... in two ways. Sometimes, a man's understanding is enlightened by an angel to know what is good, but it is not instructed as to the reason why ... But sometimes he is instructed by angelic illumination, both that this act is good and as to the reason why it is good.

I would rather feel compassion than know the meaning of it. I would hope to act with compassion without thinking of personal gain.

Since faith rests upon infallible truth, and since the contrary of a truth can never be demonstrated, it is clear that the arguments brought against faith cannot be demonstrations, but are difficulties that can be answered.

Wonder is the desire of knowledge.

If a man deliberately abstains from wine to such an extent that he does serious harm to his nature, he will not be free from blame.

One cannot use an evil action with reference to a good intention.