Be able to defend your arguments in a rational way. Otherwise, all you have is an opinion.

I think one of the problems [with raising intelligent children] is compulsory schooling...and that children are sitting there and they are taught and told what to believe. They are passive from the very beginning, and one must be very, very aggressive intellectually to have a high IQ [...] the child is taught. Right from the beginning, it's a passive process. He or she sits there, and they simply try to believe everything they're told.

Profit is what we have left after we make a donation to a worthwhile cause.

Be able to back up a car for a considerable distance in a straight line and back out of a driveway.

I believe Picasso's success is just one small part of the broader modern phenomenon of artists themselves rejecting serious art- perhaps partly because serious art takes so much time and energy and talent to produce-in favor of what I call `impulse art': art work that is quick and easy, at least by comparison.

...there are days when I feel I can do anything and days when I feel I can do nothing. But fortunately for those around me, neither sort occurs very often.

Teens think listening to music helps them concentrate. It doesn't. It relieves them of the boredom that concentration on homework induces.