John 15:2, 4, 8

Every branch in Me that does not bear fruit, He takes away; and every branch that continues to bear fruit, He [repeatedly] prunes, so that it will bear more fruit [even richer and finer fruit].

Remain in Me, and I [will remain] in you. Just as no branch can bear fruit by itself without remaining in the vine, neither can you [bear fruit, producing evidence of your faith] unless you remain in Me.

My Father is glorified and honored by this, when you bear much fruit, and prove yourselves to be My [true] disciples.