God does not die on the day when we cease to believe in a personal deity, but we die on the day when our lives cease to be illumined by the steady radiance, renewed daily, of a wonder, the source of which is beyond all reason.
“I must confess that, at that time, I had absolutely no knowledge of the slowness of the relaxation processes in the ground state, processes which take place in collisions with the wall or with the molecules of a foreign gas.”