"The opposite of a shallow truth is a falsehood. The opposite of a profound truth may well be another profound truth."

"The purpose of science is not to answer ultimate questions, but to make progress in understanding."

"The task is not so much to see what no one has yet seen, but to think what nobody has yet thought, about that which everybody sees."

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

"The electron is not a 'thing' in the ordinary sense, but a 'tendency to exist'."