I am a determinist. As such, I do not believe in free will...Practically, I am, nevertheless, compelled to act as if freedom of the will existed. If I wish to live in a civilized community, I must act as if man is a responsible being.

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.

It's not that life has been easy, perfect or exactly as expected. I just choose to be happy and grateful no matter how it all turns out. If people are good only because they fear punishment, and hope for reward, then we are a sorry lot indeed.

The only reason for time is so that everything doesn't happen at once.

Pure mathematics is, in its way, the poetry of logical ideas.

I do know that kind fate allowed me to find a couple of nice ideas after many years of feverish labor.

Necessity is the mother of all invention.