John 15:1-4

I am the true vine, and my Father is the husbandman. Every branch in me that beareth not fruit, he taketh it away: and every branch that beareth fruit, he cleanseth it, that it may bear more fruit. Already ye are clean because of 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; so neither can ye, except ye abide in me.