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

"We should take care not to make the intellect our god; it has, of course, powerful muscles, but no personality."

"As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality."

"When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity."

"The whole of science is nothing more than a refinement of everyday thinking."

"The man of science is a poor philosopher."

"If A is a success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut."

"One may say the eternal mystery of the world is its comprehensibility."

"Make things as simple as possible but no simpler."

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