John the Apostle
John 15:6BSB·traditional attribution

If anyone does not remain in Me, he is like a branch that is thrown away and withers. Such branches are gathered up, thrown into the fire, and burned.

John Calvin Reformed @genevareformer

6. If any one abide not in me. He again lays before them the punishment of ingratitude, and, by doing so, excites and urges them to perseverance. It is indeed the gift of God, but the exhortation to fear is not uncalled for, lest our flesh, through too great indulgence, should root us out. He is cast out, and withered, like a branch.

Matthew Henry Presbyterian @wholebiblehenry

Here Christ discourses concerning the fruit, the fruits of the Spirit, which his disciples were to bring forth, under the similitude of a vine. Observe here, I. The doctrine of this similitude; what notion we ought to have of it. 1. That Jesus Christ is the vine, the true vine.

Commenting on John 15:1-8

John Gill Reformed Baptist @doctorgill

If ye abide in me, and my words abide in you,.... Abiding in Christ is here explained by his words or doctrines abiding in his disciples; by which are meant his Gospel, and the truths of it. This abides when it comes in power, and becomes the engrafted word; and may be said to do so, when such, in whose hearts it has a place...