John 15:4

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.

26. Who is that adulterous woman whom the prophet Hosea points out, who said, "I will go after my lovers, that give me my bread and my water, my wool and my flax, and everything that befits me?" Let us grant that we may understand this also of the people of the Jews that went astray; yet whom else are the false Christians (such as are all heretics and schismatics) wont to imitate, except false Israelites? For there were also true Israelites, as the Lord Himself bears witness to Nathanael, "Behold an Israelite indeed, in whom is no guile." But who are true Christians, save those of whom the same Lord said, "He that hath my commandments, and keepeth them, he it is that loveth me?" But what is it to keep His commandments, except to abide in love? Whence also He says, "A new commandment I give unto you, that ye love one another;" and again, "By this shall all men know that ye are my disciple …

Chapter 22. 49. Petilianus said: "It may be urged that Christ said to His apostles, as you are constantly quoting against us, ‘He that is washed needeth not save to wash his feet, but is clean every whit.’ Now if you discuss those words in all their fullness, you are bound by what immediately follows. For this is what He said, in His very words: ‘He that is washed needeth not save to wash his feet, but is clean every whit: and ye are clean, but not all. But this he said on account of Judas, who should betray Him; therefore said He, Ye are not all clean.’ Whosoever, therefore, has incurred the guilt of treason, has forfeited, like you, his baptism. Again, after that the betrayer of Christ had himself been condemned, He thus more fully confirmed His words to the eleven apostles: ‘Now are ye clean through the word which I have spoken unto you. …

3. But why is it that He went away to make such preparation, when, as it is certainly we ourselves that are the subjects in need of preparation, His doing so will be hindered by leaving us behind? I explain it, Lord, as I can: it was surely this Thou didst signify by the preparation of those mansions, that the just ought to live by faith. For he who is sojourning at a distance from the Lord has need to be living by faith, because by this we are prepared for beholding His countenance. For “blessed are the pure in heart, for they shall see God;” and “He purifieth their hearts by faith.” The former we find in the Gospel, the latter in the Acts of the Apostles. But the faith by which those who are yet to see God have their hearts purified, while sojourning at a distance here, believeth what it doth not see; for if there is sight, there is no longer faith. …

Ver. 4 . “As the branch cannot bear fruit of itself except it abide in the vine, so neither can he who abideth not in Me.” For that they might not be separated from Him by timidity, He fasteneth and glueth to Himself their souls slackened through fear, and holdeth out to them good hopes for the future. For the root remains, but to be taken away, or to be left, belongs to the branches. Then having urged them on in both ways, by things pleasant and things painful, He requireth first what is to be done on our side.

4. Thou art receiving not a perishable but a spiritual shield. Henceforth thou art planted in the invisible Paradise. Thou receivest a new name, which thou hadst not before. Heretofore thou wast a Catechumen, but now thou wilt be called a Believer. Thou art transplanted henceforth among the spiritual olive-trees, being grafted from the wild into the good olive-tree, from sins into righteousness, from pollutions into purity. Thou art made partaker of the Holy Vine. Well then, if thou abide in the Vine, thou growest as a fruitful branch; but if thou abide not, thou wilt be consumed by the fire. Let us therefore bear fruit worthily. God forbid that in us should be done what befell that barren fig-tree, that Jesus come not even now and curse us for our barrenness. …