Augustine of Hippo : And what are those commandments? "This," saith he, "is His commandment, That we should believe on the name of His Son Jesus Christ, and love one another." Ye see that this is the commandment: ye see that whoso doeth aught against this commandment, doeth the sin from which "every one that is born of God" is free. "As He gave us commandment:" that we love one another. "And he that keepeth His commandment" - ye see that none other thing is bidden us than that we love one another - "And he that keepeth His commandment shall abide in Him, and He in him." "And in this we know that He abideth in us, by the Spirit which He hath given us." Is it not manifest that this is what the Holy Ghost works in man, that there should be in him love and charity? Is it not manifest, as the Apostle Paul saith, that "the love of God is shed abroad in our hearts by the Holy Ghost which is given us"? For our apostle was speaking of charity, and was saying that we ought in the sight of God to interrogate our own heart. "But if our heart think not ill of us:" i.e. if it confess that from the love of our brother is done in us whatever is done in any good work. — Ten Homilies on 1 John 6 Augustine of Hippo : And then besides, in speaking of the commandment, he says this: "This is His commandment, That we should believe on the name of His Son Jesus Christ, and love one another, as He gave us commandment." "And he that doeth His commandment abideth in Him, and He in him. In this we know that He abideth in us, by the Spirit which He hath given us." If in truth thou find that thou hast charity, thou hast the Spirit of God in order to understand: for a very necessary thing it is. — Ten Homilies on 1 John 6 Augustine of Hippo : In the earliest times, "the Holy Ghost fell upon them that believed: and they spake with tongues," which they had not learned, "as the Spirit gave them utterance." These were signs adapted to the time. For there behooved to be that betokening of the Holy Spirit in all tongues, to shew that the Gospel of God was to run through all tongues over the whole earth. That thing was done for a betokening, and it passed away. In the laying on of hands now, that persons may receive the Holy Ghost, do we look that they should speak with tongues? Or when we laid the hand on these infants, did each one of you look to see whether they would speak with tongues, and, when he saw that they did not speak with tongues, was any of you so wrong-minded as to say, These have not received the Holy Ghost; for, had they received, they would speak with tongues as was the case in those times? If then the witness of the presence of the Holy Ghost be not now given through these miracles, by what is it given, by what does one get to know that he has received the Holy Ghost? Let him question his own heart. If he love his brother the Spirit of God dwelleth in him. — Ten Homilies on 1 John 6 Augustine of Hippo : Let him see, let him prove himself before the eyes of God, let him see whether there be in him the love of peace and unity, the love of the Church that is spread over the whole earth. Let him not rest only in his loving the brother whom he has before his eyes, for we have many brethren whom we do not see, and in the unity of the Spirit we are joined to them. What marvel that they are not with us? We are in one body, we have one Head, in heaven. Brethren, our two eyes do not see each other; as one may say, they do not know each other. But in the charity of the bodily frame do they not know each other? For, to shew you that in the charity which knits them together they do know each other; when both eyes are open, the right may not rest on some object, on which the left shall not rest likewise. Direct the glance of the right eye without the other, if thou canst. Together they meet in one object, together they are directed to one object: their aim is one, their places diverse. If then all who with thee love God have one aim with thee, heed not that in the body thou art separated in place; the eyesight of the heart ye have alike fixed on the light of truth. — Ten Homilies on 1 John 6 Augustine of Hippo : Then if thou wouldest know that thou hast received the Spirit, question thine heart: lest haply thou have the sacrament, and have not the virtue of the sacrament. Question thine heart. If love of thy brethren be there, set thy mind at rest. There cannot be love without the Spirit of God: since Paul cries, "The love of God is shed abroad in your hearts by the Holy Spirit which is given unto us." — Ten Homilies on 1 John 6 Bede : And he who keeps his commandments abides in him, and he in him. Let God therefore be your home, and be the home of God; abide in God, and let God abide in you. God abides in you to hold you, you abide in God so that you do not fall. Keep his commandments, hold onto charity. Do not separate yourself from faith in him, so that you glory in his presence, and you will remain secure in him, now through faith, then through sight. And he will remain eternally in you, as the Psalmist sings of him: They shall exult forever, and you will dwell in them (Psalm V). — Commentary on the Catholic Epistles Bede : And by this we know that He abides in us, by the Spirit whom He has given us. In the early times, the Holy Spirit fell upon believers, and they spoke in tongues which they had not learned. But now, because the holy Church does not need external signs, whoever believes in the name of Jesus Christ and has fraternal love bears witness to the Holy Spirit dwelling in them. For this is what the Holy Spirit does in a person, so that there is love in them. For love (says Paul) is poured into our hearts by the Holy Spirit who has been given to us (Rom. V). Yet because many, not having love, and by perverse doctrine tearing the unity of the Church, nonetheless contend that the Holy Spirit is in them, it is rightly added: — Commentary on the Catholic Epistles Clement of Alexandria ((as quoted by Cassiodorus)) : "And hereby we know that He dwells in us by His Spirit, which He has given us;" that is, by superintendence and foresight of future events. — From the Latin Translation of Cassiodorus Oecumenius : And let us love one another, as he commanded; and whoever keeps his commandments abides in him, and he in them. And by this we know that he abides in us, by the Spirit whom he has given us. This is, he says, let us love each other with true affection. And where did he command this? In these words, when he says: "As you wish that others would do to you, do so to them." (Matt. 7:12) Therefore, if we desire that our neighbors are truly and sincerely affectionate towards us, we must be entirely similarly affectionate towards them. If this is the Lord's command, much more if we abide in Him or are established in Him, He will also present Himself to us. (1 Tim. 2:15) For He cannot deny Himself: that is, He cannot be taken away, while He provides us with His commandments, but He first establishes these in Himself. However, if this is the case, certainly if we keep His commands, we will have Him listening to us in all that we ask of Him, and His gift will be firm in us. The whole sentiment of the rule is this: That we believe in the name of His Son Jesus Christ, and love one another truly, as His commandment is. For whoever keeps His commandments abides in Him, and He in them. And by this we know that He abides in us, by the Spirit or gift which He has given us. Indeed, as long as this sanctuary remains, we undoubtedly have an indestructible gift of His. But how will it be a sanctuary? If we do not neglect anything of what He has commanded us regarding love. — Commentary on 1 John