I'm not offended by all the dumb blonde jokes because I know I'm not dumb... and I also know that I'm not blonde.

Common sense is genius dressed in its working clothes.

There are no great limits to growth because there are no limits of human intelligence, imagination, and wonder.

All intelligent thoughts have already been thought what is necessary is only to try to think them again.

The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.