The only thing more dangerous than ignorance is arrogance
My mind is my laboratory.
Although I tried to be universal in thought, I am European by instinct and inclination.
The greatest knowledge a person can possess is the address of the local library.
Everything you can imagine, nature has already created.
In the matter of physics, the first lessons should contain nothing but what is experimental and interesting to see. A pretty experiment is in itself often more valuable than twenty formulae extracted from our minds.