Directing is a more pragmatic experience, where you have to deal with the restrictions of time and money that force you to make certain decisions you don't have to make when you're writing.
“When I was a kid, I would do stupid things on my bike. I'd jump any ramp, I'd jump over people, I'd jump over things - always crashing, never hurting myself badly but always wanting to take physical risks.”
“Even a mistake may turn out to be the one thing necessary to a worthwhile achievement.”