Everything should be made as simple as possible, but not simpler.
Let every man be respected as an individual and no man idolized.
Anyone who has never made a mistake has never tried anything new.
If people are good only because they fear punishment, and hope for reward, then we are a sorry lot indeed.
We can't solve problems by using the same kind of thinking we used when we created them.
Confusion of goals and perfection of means seems, in my opinion, to characterize our age.
Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.
Most people say that is it is the intellect which makes a great scientist. They are wrong: it is character.
I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
He who joyfully marches in rank and file has already earned my contempt. He has been given a large brain by mistake, since for him the spinal cord would suffice.
Nationalism is an infantile sickness. It is the measles of the human race.
The most important tool of the theoretical physicist is his wastebasket.
The physicist's greatest tool is his wastebasket.
Everything should be as simple as it is, but not simpler.
Things should be made as simple as possible, but not any simpler.
Not everything that can be counted counts, and not everything that counts can be counted.
The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing.