“The supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a simple datum of experience.”

“Everything must be made as simple as possible. But not simpler.”

“The definition of genius is taking the complex and making it simple.”

“When the solution is simple, God is answering.”

“Possessions, outward success, publicity, luxury - to me these have always been contemptible. I believe that a simple and unassuming manner of life is best for everyone, best for both the body and the mind.”

“A theory is something nobody believes, except the person who made it. An experiment is something everybody believes, except the person who made it.”

“It would be possible to describe everything scientifically, but it would make no sense; it would be without meaning, as if you described a Beethoven symphony as a variation of wave pressure.”