Andreas of Caesarea : Rejecting ungodliness, John goes on to teach the doctrine of godliness and to encourage his listeners to accept it, saying that by it they will have fellowship with both the Father and the Son, as well as the promise of eternal life. — CATENA Augustine of Hippo : "Let that therefore abide in you, which ye have heard from the beginning. If that which ye have heard from the beginning shall abide in you, ye also shall abide in the Son, and in the Father. And this is the promise that He hath promised us." For haply thou mightest ask about the wages, and say, Behold, "that which I have heard from the beginning I keep safe in me, I comply therewith; perils, labors, temptations, for the sake of this continuance, I bear up against them all: with what fruit? what wages? what will He hereafter give me, since in this world I see that I labor among temptations? I see not here that there is any rest: mere mortality weigheth down the soul, and the corruptible body presseth it down to lower things: but I bear all things, that "that which I have heard from the beginning" may "remain" in me; and that I may say to my God, "Because of the words of Thy lips have I kept hard ways." Unto what wages then? Hear, and faint not. If thou wast fainting in the labors, upon the promised wages be strong. Where is the man that shall work in a vineyard, and shall let slip out of his heart the reward he is to receive? Suppose him to have forgotten, his hands fail. The remembrance of the promised wages makes him persevering in the work: and yet he that promised it is a man who can deceive thine expectation. How much more strong oughtest thou to be in God's field, when He that promised is the Truth, Who can neither have any successor, nor die, nor deceive him to whom the promise was made! — Ten Homilies on 1 John 3 Bede : That which you have heard from the beginning, let it remain in you, etc. He says, follow with all your heart that faith, those doctrines which you have received from the voice of the apostles from the earliest times of the nascent Church. For these alone are what make you partakers of divine grace. And if anyone says to you, "Behold, here is Christ, behold, there he is," do not believe it. For false prophets will arise, as the Lord foretold (Mark XIII). And you, he says, will remain in the Son and in the Father. He places the Son first, because as the Son himself says: "No one comes to the Father except through the Son" (John XIV); no one will see the glory of divine exaltation except he who is reborn through the sacraments of the humanity which the Son assumed. Or surely he named the Son first and then the Father for the reason that the Arians may not say that the Son should be believed to be lesser than the Father because he has never found to be named before the Father. — Commentary on the Catholic Epistles Oecumenius : "Therefore, let what you heard from the beginning remain in you. If what you heard from the beginning remains in you, then you will remain in the Son and in the Father." Therefore, John says this: but you, let what you have heard from the beginning, namely the divine teaching about Christ, remain in you. The name means, "Let it remain in you." "For if what you heard from the beginning remains in you, you will also remain in the Son and in the Father." This is, you will be his partners. — Commentary on 1 John