“Everyone has a theory of human nature. Everyone has to anticipate the behavior of others, and that means we all need theories about what makes people tick.”

“Christianity is not a doctrine, not, I mean, a theory about what has happened & will happen to the human soul, but a description of something that actually takes place in human life.”

“Experience by itself teaches nothing... Without theory, experience has no meaning. Without theory, one has no questions to ask. Hence, without theory, there is no learning.”

“After examining the philosophies, the theories, and the practiced methods of influencing human behavior, I was shocked to learn the simplicity of that one small fact: You will become what you think about most; your success or failure in anything, large or small, will depend on your programming - what you accept from others, and what you say when you talk to yourself.It is no longer a success theory; it is a simple but powerful fact. Neither luck nor desire has the slightest thing to do with it. It makes no difference whether we believe it or not. The brain simply believes what you tell it most. And what you tell it about you, it will create. It has no choice.”

“Why does the universe go to all the bother of existing? Is the unified theory so compelling that it brings about its own existence? Or does it need a creator, and, if so, does he have any other effect on the universe? And who created him?....Up to now, most scientists have been too occupied with the development of new theories that describe what the universe is to ask the question why. On the other hand, the people whose business it is to ask why, the philosophers, have not been able to keep up with the advance of scientific theories....However, if we do discover a complete theory, it should in time be understandable in broad principle by everyone, not just a few scientists. Then we shall all, philosophers, scientists, and just ordinary people, be able to take part in the discussion of the question of why it is that we and the universe exist. If we find the answer to that, it would be the ultimate triumph of human reason--for then we would know the mind of God.”

“The individualism of current economic theory is manifest in the purely self-interested behavior it generally assumes. It has no real place for fairness, malevolence, and benevolence, nor for the preservation of human life or any other moral concern.”