Opinions about obviousness are to a certain extent a function of time.

It takes a different kind of thinking to solve a problem than the kind of thinking which produced the problem.

The fear of death is the most unjustified of all fears, for there's no risk of accident for someone who's dead.

That is the way to learn the most, that when you are doing something with such enjoyment that you don't notice that the time passes.

The release of atomic energy has not created a new problem. It has merely made more urgent the necessity of solving an existing one.

Sometimes one pays most for the things one gets for nothing.

If only I had known, I should have become a watchmaker.