"Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it."

"The great thing is to be able to make a mistake without knowing it."

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

"The role of consciousness in quantum mechanics is still a mystery."

"It is not the job of science to tell us how the world is, but what we can say about it."