Scientific greatness is less a matter of intelligence than character; if the scientist refuses to compromise or accept incomplete answers and persists in grappling the most basic and difficult questions.

One should not pursue goals that are easily achieved. One must develop an instinct for what one can just barely achieve through one’s greatest efforts.

I am not a genius, I am just curious. I ask many questions. and when the answer is simple, then God is answering.

If I can't picture it, I can't understand it.

Relativity teaches us the connection between the different descriptions of one and the same reality.

There is only one road to human greatness: through the school of hard knocks.

Everyone should be respected as an individual, but no one idolized.