Why is Jesus called “the True Vine” (John 15:1)?

Q395 · Titles and Names of the Savior that Witness to the Works of His Love

St. John Chrysostom says, “He made mention of the root in no other connection than that they might learn that nothing can be done without His power and that they must be united to Him by faith as the branch is to the vine.”⁷⁷⁷