Andreas of Caesarea : Some people argue from this that God made man according to his image but not according to his likeness, which he will give us later on. We have supposedly believed in him according to the likeness which we have, and if that is worthy enough, then we shall receive God's likeness as well. But if you have believed according to the likeness and then turn away from it and destroy it, who will give you what belongs to the likeness? You will not be able to acquire the likeness unless you have fully perfected the image first. This is supposed to be why John adds the words: "Everyone who thus hopes in him purifies himself, as he is pure." But my bishop, in his letter to Conon, has shown on the basis of the recognized Fathers of the church that the image and the likeness are one and the same thing and that John was speaking here of something which has already taken place. — CATENA Augustine of Hippo : "And every one that hath this hope in Him." Ye see how he hath set us our place, in "hope." Ye see how the Apostle Paul agreeth with his fellow-apostle, "By hope we are saved. But hope that is seen, is not hope: for what a man seeth, why doth he hope for? For if what we see not, we hope for, by patience we wait for it." This very patience exerciseth desire. Continue thou, for He continueth: and persevere thou in walking, that thou mayest reach the goal: for that to which thou tendest will not remove. See: "And every one that hath this hope in Him, purifieth himself even as He is pure." See how he has not taken away free-will, in that he saith, "purifieth himself." Who purifieth us but God? Yea, but God doth not purify thee if thou be unwilling. Therefore, in that thou joinest thy will to God, in that thou purifiest thyself. Thou purifiest thyself, not by thyself, but by Him who cometh to inhabit thee. Still, because thou doest somewhat therein by the will, therefore is somewhat attributed to thee. But it is attributed to thee only to the end thou shouldest say, as in the Psalm, "Be thou my helper, forsake me not." If thou sayest, "Be thou my helper," thou doest somewhat: for if thou be doing nothing, how should He be said to "help" thee? — Ten Homilies on 1 John 4 Bede : And everyone who has this hope in Him purifies himself, etc. Many say they have the hope of heavenly life in Christ, but they make this confession void by living negligently. However, he shows a clear sign of his hope of the hereafter in himself, who strives to give diligence to good deeds, being certain that no one will reach the likeness of God in the future otherwise, unless by sanctifying himself in the present, that is, by renouncing impiety and worldly desires, and by living soberly, justly, and piously, he imitates the holiness of God. We are commanded to imitate the purity of divine holiness according to the measure of our capacity, just as we are enjoined to hope for the glory of divine likeness according to our measure, that is, the measure of the creature. It is not to be believed that the Pelagian dogma is to be supported—what is said about man "He purifies himself"—as if anyone could sanctify himself by free will without divine aid. But he who has hope in the Lord purifies himself to the extent he can by striving, and by imploring His grace in all things, who says: "Without me, you can do nothing" (John XV); and saying to Him: "Be my helper, do not forsake me" (Psalm XXVI). — Commentary on the Catholic Epistles Clement of Alexandria : And by following the divine scripture, the path by which believers travel, we are to be made like unto the Lord as far as possible. We must not live as if there were no difference between right and wrong, but, to the best of our power, must purify ourselves from indulgence and lust and take care for our soul which must continually be devoted to the Deity alone. For when it is pure and set free from all evil the mind is somehow capable of receiving the power of God and the divine image is set up in it. "And everyone who has this hope in the Lord purifies himself," says the Scripture, "even as he is pure." To attain the knowledge of God is impossible for those who are still under the control of their passions. Therefore they cannot attain the salvation they hope for as they have not obtained any knowledge of God. — The Stromata Book 3 Hilary of Arles : We shall see him as he is because we shall be like him. This is our hope for the future, our love in the present and our faith in both the past and the present. — INTRODUCTORY COMMENTARY ON 1 JOHN Tertullian : Accordingly he says more manifestly: "And every (man) who hath this hope in Him maketh himself chaste, just as Himself withal is chaste." For elsewhere, again, (we read): "Be ye holy, just as He withal was holy " -in the flesh, namely. — On Monogamy Tertullian : For unto this end was manifested the Son of God, to undo the works of the devil: "for He has "undone" them withal, by setting man free through baptism, the "handwriting of death" having been "made a gift of" to him: and accordingly, "he who is being born of God doeth not sin, because the seed of God abideth in him; and he cannot sin, because he hath been born of God. Herein are manifest the sons of God and the sons of the devil." Wherein? except it be (thus): the former by not sinning, from the time that they were born from God; the latter by sinning, because they are from the devil, just as if they never were born from God? But if he says, "He who is not righteous is not of God," how shall he who is not modest again become (a son) of God, who has already ceased to be so? — On Modesty