Sometimes one pays most for the things one gets for nothing.
Every kind of peaceful cooperation among men is primarily based on mutual trust and only secondly on institutions such as courts of justice and police.
It is harder to crack a prejudice than an atom.
Insanity: doing the same thing over and over again and expecting different results.
The most incomprehensible thing about the world is that it is at all comprehensible.
The eternal mystery of the world is its comprehensibility.
Education is what remains after one has forgotten everything he learned in school.
Anyone who has never made a mistake has never tried anything new.
The only real valuable thing is intuition. The intellect has little to do on the road to Discovery.
Two things inspire me to awe: the starry heavens and the moral universe within.
As our circle of knowledge expands, so does the circumference of darkness surrounding it.
Before God we are all equally wise— and equally foolish.
I don't pretend to understand the universe— it's much bigger than I am.
I never think of the future. It comes soon enough.
Try not to become a man of success, but rather try to become a man of value.
Only a life lived for others is a life worthwhile.
It's not that I'm so smart, it's just that I stay with problems longer.
Science is a wonderful thing if one does not have to earn one's living at it.
Weakness of attitude becomes weakness of Character.
The difference between genius and stupidity is that genius has its limits.