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