John 15:2

Verse 2. Every branch in me. Every one that is a true follower of me, that is united to me by faith, and that truly derives grace and strength from me, as the branch does from the vine. The word branch includes all the boughs, and the smallest tendrils that shoot out from the parent stalk. Jesus here says that he sustains the same relation to his disciples that a parent stalk does to the branches; but this does not denote any physical or incomprehensible union. It is a union formed by believing on him; resulting from our feeling our dependence on him and our need of him; from embracing him as our Saviour, Redeemer, and Friend.