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

Freud's view is that all love is sexual in its origin or its basis. Even those loves which do not appear to be sexual or erotic have a sexual root or core. They are all sublimations of the sexual instinct.

Friendship is a very taxing and arduous form of leisure activity

The ultimate end of education is happiness or a good human life, a life enriched by the possession of every kind of good, by the enjoyment of every type of satisfaction.

Love can be unselfish, in the sense of being benevolent and generous, without being selfless.

The love which moves the world, according to common Christian belief, is God's love and the love of God.