To disparage the dictate of reason is equivalent to contemning the command of God.

It is a sin directly against one's neighbour, since one man cannot over-abound in external riches, without another man lacking them.

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.

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

Do not wish to jump immediately from the streams to the sea, because one has to go through easier things to the more difficult.

Bestow upon me, O Lord my God, understanding to know thee, diligence to seek thee, wisdom to find thee, and a faithfulness that may finally embrace thee.

One aspect of neighbourly love is that we must not merely will our neighbours good, but actually work to bring it about.