An idea is a light turned on in a man's soul. Comic-strip artists are in the habit of representing it by means of a light bulb flashing on, above the head of a character who has suddenly grasped an idea. In simple, primitive terms, this is an appropriate symbol.

To know one's own desires, their meaning and their costs requires the highest human virtue: rationality.

People, he thought, were as hungry for a sight of joy as he had always been--for a moment's relief from that gray load of suffering which seemed so inexplicable and unnecessary. He had never been able to understand why men should be unhappy.

She knew that she could not have reached this white serenity except as the sum of all the colors, of all the violence she had known.

Hence the sterile, uninspiring futility of a great many theoretical discussions of ethics, and the resentment which many people feel towards such discussions: moral principles remain in their minds as floating abstractions, offering them a goal they cannot grasp and demanding that they reshape their souls in its image, thus leaving them with a burden of undefinable moral guilt.

The [U.S.] Constitution is a limitation on the government, not on private individuals ... it does not prescribe the conduct of private individuals, only the conduct of the government ... it is not a charter for government power, but a charter of the citizen's protection against the government.

When man learns to understand and control his own behavior as well as he is learning to understand and control the behavior of crop plants and domestic animals, he may be justified in believing that he has become civilized.