The existence of a prime mover- nothing can move itself; there must be a first mover. The first mover is called God.

Man cannot live without joy; therefore when he is deprived of true spiritual joys it is necessary that he become addicted to carnal pleasures.

Secondly, man sins against nature when he goes against his generic nature, that is to say, his animal nature. Now, it is evident that, in accord with natural order, the union of the sexes among animals is ordered towards conception. From this it follows that every sexual intercourse that cannot lead to conception is opposed to man's animal nature.

The soul is perfected by knowledge and virtue.

Every cell in us worships God.

Law; an ordinance of reason for the common good, made by him who has care of the community.

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