The only way to deal with the complexity of the world is to simplify it.

The real moral test of a society is how it treats those who are at the dawn of life, the children; those who are in the twilight of life, the aged; and those who are in the shadow of life, the sick, the needy and the handicapped.

The mind is an unnecessary construct for explaining behavior.

The past is a foreign country; they do things differently there.

永远不要停止学习，因为世界永远不会停止变化。