The world is being Americanized and technologized to its limits, and that makes it dull for some people. Reaching the Moon restores the frontier and gives us the lands beyond.

Self-education is a continuing source of pleasure to me, for the more I know, the fuller my life is and the better I appreciate my own existence

When life is so harsh that a man loses all hope in himself, then he raises his eyes to a shining rock, worshipping it, just to find hope again, rather than looking to his own acts for hope and salvation. Yes, atheism IS a redemptive belief. It is theism that denies man's own redemptive nature.

The easiest way to solve a problem is to deny it exists.

People are entirely too disbelieving of coincidence. They are far too ready to dismiss it and to build arcane structures of extremely rickety substance in order to avoid it. I, on the other hand, see coincidence everywhere as an inevitable consequence of the laws of probability, according to which having no unusual coincidence is far more unusual than any coincidence could possibly be.

The greatest weapons in the conquest of knowledge are an understanding mind and the inexorable curiosity that drives it on.

However, I continue to try and I continue, indefatigably, to reach out. There's no way I can single-handedly save the world or, perhaps, even make a perceptible difference - but how ashamed I would be to let a day pass without making one more effort.