John 15:7

Having said that they were clean through the word which He had spoken to them, He now taught them that they must do their part.

Abide in Me, and I in you: not they in Him, as He in them; for both are for the profit not of Him, but them. The branches do not confer any advantage upon the vine, but receive their support from it: the vine supplies nourishment to the branches, takes none from them: so that the abiding in Christ, and the having Christ abiding in them, are both for the profit of the disciples, not of Christ; according to what follows, As the branch cannot bear fruit of itself, except it abide in the vine, no more can you, except you abide in Me. Great display of grace! He strengthens the hearts of the humble, stops the mouth of the proud. They who hold that God is not necessary for the doing of good works, the subverters, not the asserters, of free will, contradict this truth. For he who thinks that he bears fruit of himself, is not in the vine; he who is not in the vine, is not in Christ; he who is not in Christ, is not a Christian.

All the fruit of good works proceeds from this root. He who has delivered us by His grace, also carries us onward by his help, so that we bring forth more fruit. Wherefore He repeats, and explains what He has said: I am the vine, you are the branches. He that abides in Me, by believing, obeying, persevering, and I in Him, by enlightening, assisting, giving perseverance, the same, and none other, brings forth much fruit.

But lest any should suppose that a branch could bring forth a little fruit of itself, He adds, For without Me you can do nothing. He does not say, you can do little. Unless the branch abides in the vine, and lives from the root, it can bear no fruit whatever. Christ, though He would not be the vine, except He were man, yet could not give this grace to the branches, except He were God.

The Son then contributes no less than the Father to the help of the disciples. The Father changes, but the Son keeps them in Him, which is that which makes the branches fruitful. And again, the cleansing is attributed to the Son also, and the abiding in the root to the Father who begot the root. It is a great loss to be able to do nothing, but He goes on to say more than this: If a man abide not in Me, he is cast forth as a branch, i.e. shall not benefit by the care of the husbandman, and withers, i.e., shall lose all that it desires from the root, all that supports its life, and shall die.

And men gather them, i.e., the reapers, the Angels, and cast them into the fire, everlasting fire, and they are burned.

For the branches of the vine are as contemptible, if they abide not in the vine, as they are glorious, if they abide. One of the two the branch must be in, either the vine, or the fire: if it is not in the vine, it will be in the fire.

Then He shows what it is to abide in Him. If you abide in Me, and My words abide in you, you shall ask what you will and it shall be done to you. It is to be shown by their works.

For then may His words be said to abide in us, when we do what He has commanded, and love what He has promised. But when His words abide in the memory and are not found in the life, the branch is not accounted to be in the vine, because it derives no life from its root. So far as we abide in the Savior we cannot will any thing that is foreign to our salvation. We have one will, insofar as we are in Christ, another, insofar as we are in this world And by reason of our abode in this world, it sometimes happens that we ask for that which is not expedient, through ignorance. But never, if we abide in Christ, will He grant it us, Who does not grant except what is expedient for us. And here we are directed to the prayer, Our Father. Let us adhere to the words and the meaning of this prayer in our petitions, and whatever we ask will be done for us.

But, moreover, that such things as these are so spoken to saints who will persevere, as if it were reckoned uncertain whether they will persevere, is a reason that they ought not otherwise to hear these things, since it is well for them “not to be high-minded, but to fear.” For who of the multitude of believers can presume, so long as he is living in this mortal state, that he is in the number of the predestinated? Because it is necessary that in this condition that should be kept hidden; since here we have to beware so much of pride, that even so great an apostle was buffetted by a messenger of Satan, lest he should be lifted up. Hence it was said to the apostles, “If ye abide in me;” and this He said who knew for a certainty that they would abide; and through the prophet, “If ye shall be willing, and will hear me,” although He knew in whom He would work to will also. …