"I believe in intuitions and inspirations. I sometimes feel that I am right. I do not know that I am."

"Insanity: doing the same thing over and over again and expecting different results."

"The difference between genius and stupidity is that genius has its limits."

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."

"The most beautiful experience we can have is the mysterious. It is the fundamental emotion which stands at the cradle of true art and true science."