Matthew 18:20

And He said not, I will be, but I am in the midst of them; because straightway, as soon as they have agreed together, Christ is found among them.

For He who is peace and charity, will set His place and habitation in good and peaceable dispositions.

Or otherwise; All His foregoing discourse had invited us to union; now to make us embrace peace more anxiously, He holds out a reward, promising to be in the midst of two or three.

"And again I say unto you, that if two of you shall agree on earth as touching anything that they shall ask, it shall be done for them of my Father which is in Heaven. For where two or three are gathered together in my name, there am I in the midst of them." Seest thou how by another motive also He puts down our enmities, and takes away our petty dissensions, and draws us one to another, and this not from the punishment only which hath been mentioned, but also from the good things which spring from charity? For having denounced those threats against contentiousness, He putteth here the great rewards of concord, if at least they who are of one accord do even prevail with the Father, as touching the things they ask, and have Christ in the midst of them. "Are there then indeed nowhere two of one accord?" Nay, in many places, perchance even everywhere. "How then do they not obtain all things?" Because many are causes of their failing. For either they often ask things inexpedient. And why marvellest thou, if this is the case with some others, whereas it was so even with Paul, when he heard, "My grace is sufficient for thee; for my strength is perfected in weakness." Or they are unworthy to be reckoned with them that heard these words, and contribute not their own part, but He seeks for such as are like them; therefore He saith "of you," of the virtuous, of them that show forth an angelic rule of life. Or they pray against them that have aggrieved them, seeking for redress and vengeance; and this kind of thing is forbidden, for, "Pray," saith He, "for your enemies." Or having sins unrepented they ask mercy, which thing it is impossible to receive, not only if themselves ask it, but although others having much confidence towards God entreat for them, like as even Jeremiah praying for the Jews did hear, "Pray not thou for this people, because I will not hear thee." But if all things are there, and thou ask things expedient, and contribute all thine own part, and exhibit an apostolical life, and have concord and love towards thy neighbor, thou wilt obtain on thy entreaty; for the Lord is loving towards man. Then because He had said, "Of my Father," in order that He might show that it is Himself that giveth, and not He who begat Him only, He added, "For wheresoever two or three are gathered together in my name, there am I in the midst of them." What then? are there not two or three gathered together in His name? There are indeed, but rarely. For not merely of the assembling doth He speak, neither this doth He require only; but most surely, as I said before also, the rest of virtue too together with this, and besides, even this itself He requires with great strictness. For what He saith is like this, "If any holds me the principal ground of his love to his neighbors, I will be with Him, if he be a virtuous man in other respects." But now we see the more part having other motives of friendship. For one loves, because he is loved, another because he hath been honored, a third because such a one has been useful to him in some other worldly matter, a fourth for some other like cause; but for Christ's sake it is a difficult thing to find any one loving his neighbor sincerely, and as he ought to love him. For the more part are bound one to another by their worldly affairs. But Paul did not love thus, but for Christ's sake; wherefore even when not loved in such wise as he loved, he did not cease his love, because he had planted a strong root of his affection; but not so our present state, but on inquiry we shall find with most men anything likely to produce friendship rather than this. And if any one bestowed on me power in so great a multitude to make this inquiry, I would show the more part bound one to another by worldly motives.

(ap. Anselm.) But He holds out a ratification not only of sentences of excommunication, but of every petition which is offered by men holding together in the unity of the Church; for He adds, Again I say unto you, that if two of you shall agree upon earth, whether in admitting a penitent, or casting out a forward person, touching any thing which they shall ask, any thing, that is, that is not against the unity of the Church, it shall be done for them by my Father which is in heaven. By saying, which is in heaven, He points Him out as above all, and therefore able to fulfil all that shall be asked of Him. Or, He is in the heavens, that is, with saints, proof enough that whatever worthy thing they shall ask shall be done unto them, because they have with them Him of whom they ask. For this cause is the sentence of those that agree together ratified, because God dwells in them, For where two or three are gathered together in my name, there am I in the midst of them.