I am the true vine, and my Father is the vine dresser. Every branch in me that bears not fruit he takes away: and every branch that bears fruit, he prunes it, that it may bring forth more fruit. Now you are clean through the word which I have spoken unto you. Abide in me, and I in you. As the branch cannot bear fruit of itself, except it abide in the vine; no more can you, except you abide in me. I am the vine, you are the branches: He that abides in me, and I in him, the same brings forth much fruit: for without me you can do nothing.
(John 15:1-5)