Future contingents cannot be certain to us, because we know them as such. They can be certain only to God whose understanding is in eternity above time. Just as a man going along a road does not see those who come after him; but the man who sees the whole road from a height sees all those who are going along the road at the same time.

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

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

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

If there were some solitary or feral man, the passions of the soul would be sufficient for him; by them he would be conformed to things in order that he might have knowledge of them. But because man is naturally political and social, there is need for one man to make his conceptions known to others, which is done with speech. So significant speech was needed if men were to live together. Which is why those of different tongues do not easily live together.

To live well is to work well, to show a good activity.

Man has free choice, or otherwise counsels, exhortations, commands, prohibitions, rewards and punishments would be in vain.