A lesson from Star Wars...

YODA: "Use the force. Yes. Now, the stone... Feel it. Concentrate!..."
LUKE: "Oh, no. We'll never get it out now."
YODA: "So certain are you. (sighs) Always with you it cannot be done. Hear you nothing that I say?"
LUKE: Master, moving stones around is one thing. This is totally different.
YODA: No! No different! Only different in your mind. You must unlearn what you have learned.
LUKE: (focusing, quietly) All right, I'll give it a try.
YODA: No! Try not. Do. Or do not!! There is no try...
(From Star Wars - The Empire Strikes Back)

Do. Or do not!! There is no try...