The progress of the human race in understanding the universe has established a small corner of order in an increasingly disordered universe.

If we ever do find a complete theory of the universe, it would be a great triumph of human reason but it wouldn't leave much for us to do. We need an intellectual challenge.

It is all right to make mistakes; nothing is perfect because with perfection, we would not exist.

In effect, we have redefined the task of science to be the discovery of laws that will enable us to predict events up to the limits set by the uncertainty principle.

If the government is covering up knowledge of aliens, they are doing a better job of it than they do at anything else.

There are grounds for cautious optimism that we may now be near the end ofthe search for the ultimate laws of nature.

It is tribute to how far we have come in theoretical physics that it now takes enormous machines and a great deal of money to perform experiments whose results we can not predict.