You've go to jump off the cliff

"If we listened to our intellect we'd never have a love affair. We'd never have a friendship. We'd never go in business because we'd by cynical: 'It's gonna go wrong.' Or 'She's going to hurt me.' Or, 'I've had a couple of bad love affairs, so therefore...' Well, that's nonsense. You're going to miss life. You've got to jump off the cliff all the time and build your wings on the way down."

-Ray Bradbury