Saint Thomas Aquinas

Beware of the man of one book.

It is evident that the truth exists. Because the one who denies that the truth exists, knows that the truth exists. So, if the truth does not exist, it is true that the truth does not exist.

Sin offends God, which harms man.

God, who is pure act and has no potentiality, has an infinite active power over other things.

What is received is received in the manner of the recipient.

The being of things, not their truth, is the cause of truth in understanding.

The scholar is the one who leads others to what he has understood: the truth.

Justice without mercy is cruelty.

Faith refers to things that are not seen, and hope to things that are not within reach.