Failure is simply the opportunity to begin again, this time more intelligently.

If we listened to our intellect, we'd never have a love affair. We'd never have a friendship. We'd never go into business, because we'd be cynical. Well, that's nonsense. You've got to jump off cliffs all the time and build your wings on the way down.

An intelligent man is sometimes forced to be drunk to spend time with his fools.

Common sense is not so common.

Real knowledge is to know the extent of one's ignorance.