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.

Practical sciences proceed by building up; theoretical science by resolving into components.

A man's heart is right when he wills what God wills.

Every cell in us worships God.

Mercy without justice is the mother of dissolution; justice without mercy is cruelty.

It seems that God does not exist; because if one of two contraries be infinite, the other would be altogether destroyed. But the word "God" means that He is infinite goodness. If, therefore, God existed, there would be no evil discoverable; but there is evil in the world. Therefore God does not exist.

To convert somebody go and take them by the hand and guide them.