"We are all in the same boat, in a stormy sea, and we owe each other a terrible loyalty."

"Never express yourself more clearly than you are able to think."

"Everything we call real is made of things that cannot be regarded as real."

"It is a great pity that human beings cannot find all of their satisfaction in scientific contemplativeness."

"The atom is a very small object, and the forces that bind it together are very strong."