Think how different human societies would be if they were based on love rather than justice. But no such societies have ever existed on earth.

The ability to retain a child's view of the world with at the same time a mature understanding of what it means to retain it, is extremely rare - and a person who has these qualities is likely to be able to contribute something really important to our thinking.

Television, radio, and all the sources of amusement and information that surround us in our daily lives are also artificial props. They can give us the impression that our minds are active, because we are required to react to stimuli from the outside. But the power of those external stimuli to keep us going is limited. They are like drugs. We grow used to them, and we continuously need more and more of them. Eventually, they have little or no effect. Then, if we lack resources within ourselves, we cease to grow intellectually, morally, and spiritually. And we we cease to grow, we begin to die.

All books will become light in proportion as you find light in them.

Friendship is a very taxing and arduous form of leisure activity.

Conjugal love, or the friendship of spouses, persists after sexual desires have weakened, withered, and disappeared.

Emancipation of human labor from economic servitude and exploitation, i.e., from organizations of production in which the conditions of work are determined by a master class who own the means of production, and in which the fruits of work are alienated from workers to the benefit of masters.