Theories are not so much wrong as incomplete

Working ten hour days allows you to fall behind twice as fast as you could working five hour days.

There is nothing so eternally adhesive as the memory of power.

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

Unfortunately, in many cases, people who write science fiction violate the laws of nature, not because they want to make a point, but because they don't know what the laws of nature are.

There is no belief, however foolish, that will not gather its faithful adherents who will defend it to the death.

To make discoveries, you have to be curious about why the universe is the way it is.