The purpose of learning is growth, and our minds, unlike our bodies, can continue growing as we continue to live.

The philosopher ought never to try to avoid the duty of making up his mind.

One of the aims of sexual union is procreation - the creation by reproduction of an image of itself, of the union.

We wish the joy of love, the joy of companionship, of being in the company of, in the presence of the person we love, of living a common life with that person, perhaps ultimately the joy of perfect union.

We are selfish when we are exclusively or predominantly concerned with the good for ourselves. We are altruistic when we are exclusively or predominantly concerned with the good of others.

The materialist assumption that spiritual substances do not exist is as much an act of faith as the religious belief in the reality of angels.

Freedom is the emancipation from the arbitrary rule of other men.