There are thousands of years in the past, and there is an unknown amount of time in the future. There are all kinds of opportunities, and there are all kinds of dangers.

Poets say science takes away from the beauty of the stars - mere globs of gas atoms. I, too, can see the stars on a desert night, and feel them. But do I see less or more?

I wonder why. I wonder why. I wonder why I wonder.

The Quantum Universe has a quotation from me in every chapter - but it's a damn good book anyway.

It is our responsibility to leave the people of the future a free hand.

It is our responsibility as scientists, knowing the great progress which comes from a satisfactory philosophy of ignorance, the great progress which is the fruit of freedom of thought, to proclaim the value of this freedom; to teach how doubt is not to be feared but welcomed and discussed; and to demand this freedom as our duty to all coming generations.

Work as hard and as much as you want to on the things you like to do the best.