“Is this Tree of Life a God one could worship? Pray to? Fear? Probably not. But it did make the ivy twine and the sky so blue, so perhaps the song I love tells a truth after all. The Tree of Life is...”

“The secret of happiness: Find something more important than you are and dedicate your life to it.”

“Problems in science are sometimes made easier by adding complications.”

“Imagination is cheap as long as you don't have to worry about the details.”

“Philosophers' Syndrome: mistaking a failure of the imagination for an insight into necessity.”

“Some years ago, there was a lovely philosopher of science and journalist in Italy named Giulio Giorello, and he did an interview with me. And I dont know if he wrote it or not, but the headline in ...”

“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettie...”

“To know the history of science is to recognize the mortality of any claim to universal truth. ”

“The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.”