There are certain moments when we might wish the future were built by men of the past.

The books one has written in the past have two surprises in store: one couldn't write them again, and wouldn't want to.

The least one can say of power is that a vocation for it is suspicious.

Nothing is more admirable than the fortitude with which millionaires tolerate the disadvantages of their wealth.

The beauty of science is to imagine more than we can prove. And string theory gives you a radically different interpretation of the universe.

Claims that some form of consciousness persists after our bodies die and decay into their constituent atoms face one huge, insuperable obstacle: the laws of physics underlying everyday life are completely understood, and there's no way within those laws to allow for the information stored in our brains to persist after we die.

The discovery of agriculture was the first big step toward a civilized life.

There is nothing so good for the human soul as the discovery that there are ancient and flourishing civilized societies which have somehow managed to exist for many centuries and are still in being though they have had no help from the traveler in solving their problems.