Bohr, Niels

"The universe speaks a language of mathematics and beauty."

"We are not separate from nature; we are part of it."

"The greatest achievement of science is humility before the unknown."

"Prediction is very difficult, especially about the future."

"An expert is a person who has made all the mistakes that can be made in his field."

"The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth."

"Every sentence I utter must be understood not as an affirmation, but as a question."

"There are some things so serious that you can only joke about them."

"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."

"God is subtle, but he is not malicious."

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

"Isolated knowledge is not sufficient. We need wisdom."

"The deepest principle of human conduct is the craving to be appreciated."

"Light and matter are both single entities, and the apparent duality arises in the limitations of our language."

"One of the favorite maxims of my father was the fact that the greatest delight is to act according to the dictates of reason."

"Physics concerns what we can say about nature."

"It is the tension between creativity and skepticism that has produced the stunning and unexpected findings of science."

"The first principle is that you must not fool yourself, and you are the easiest person to fool."

"A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it."

"We must be clear that when it comes to atoms, language can be used only as in poetry."

"The real problem is that the words we use are wrong."

"Nature is not only queerer than we suppose, but queerer than we can suppose."

"The task of theoretical physics is to understand the nature of reality."

"When you come to a fork in the road, take it."

"Enthusiasm is a great engine of success."

"If quantum mechanics hasn't profoundly disturbed you, you haven't understood it yet."

"The human mind, no matter how highly trained, cannot operate outside the natural laws."

"We must not pretend to be certain of what is yet uncertain."

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

"Atoms are young worlds."