I don't believe it... -That is why you fail...
The Empire Strikes Back
written by Lawrence Kasdan & Leigh Brackett, story by George Lucas
Luke: I can't. It's too big.
Yoda: Size matters not. Look at me. Judge me by my size, do you? Hmm? Hmm. And well you should not. For my ally is the Force, and a powerful ally it is. Life creates it, makes it grow. Its energy surrounds us and binds us. Luminous beings are we, not this crude matter. You must feel the Force around you; between you, me, the tree, the rock, everywhere. Yes, even between the land and the ship.