If you have done the best you can do and if you have gotten all you could extract from something, you have given all you had to give, then the time has come when you can do no more than say thank you and move on.
I'm pretty busy in my life and I'm very aware of what it takes to direct a movie. It takes a lot out of you; it takes a lot out of the rest of your life, from other people in your life. I don't lie around hungering for that consumption very often.