There is an interesting scientific dispute about realism and optimism. Some find that very optimistic people have benign illusions about themselves. These people may think they have more control, or more skill, than they actually do. Others have found that optimistic people have a good handle on reality. The jury is still out.

We know from chaos theory that even if you had a perfect model of the world, you'd need infinite precision in order to predict future events. With sociopolitical or economic phenomena, we don't have anything like that.

Something must always remain that eludes us ... For power to have an object on which it can be exercised, a space in which to stretch out its arms ... As long as I know there exists in the world someone who does tricks only for the love of the trick, as long as I know there is a woman who loves reading for reading's sake, I can convince myself that the world continues ... And every evening I, too, abandon myself to reading, like that distant unknown woman.

You are a child of the universe, no less than the trees and the stars; you have a right to be here. And whether or not it is clear to you, no doubt the universe is unfolding as it should.

The twin conceptions of sin and vindictive punishment seem to be at the root of much that is most vigorous, both in religion and politics.

It is already possible to imagine a society in which the majority of the population, that is to say, its laborers, will have almost as much leisure as in earlier times was enjoyed by the aristocracy. When one recalls how aristocracies in the past actually behaved, the prospect is not cheerful.