Whosoever believes that Jesus is the Christ is born of God: and everyone that loves him that begat loves him also that is begotten of him.
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Augustine of Hippo
AD 430
Who is he that believes not that Jesus is the Christ? He that does not so live as Christ commanded. For many say, I believe: but faith without works saves not. Now the work of faith is Love, as Paul the apostle says, And faith which works by love. Galatians 5:6 Your past works indeed, before you believed, were either none, or if they seemed good, were nothing worth. For if they were none, you were as a man without feet, or with sore feet unable to walk: but if they seemed good, before you believed, you ran indeed, but by running aside from the way you went astray instead of coming to the goal. It is for us, then, both to run, and to run in the way. He that runs aside from the way, runs to no purpose, or rather runs but to toil. He goes the more astray, the more he runs aside from the way. What is the way by which we run? Christ has told us, I am the Way. John 14:6 What the home to which we run? I am the Truth. By Him you run, to Him you run, in Him you rest. But, that we might run by H...
Eum qui genuit, ton gennesanta, generantem; which, in English, may be translated, the Father. Ver. 20. In vero Filio ejus, hic est verus Deus, en to alethino uio autou, outos estin o alethinos Theos, with the Greek article. St. Athanasius, St. Ambrose, St. Hilary, St. Augustine, St. Cyril by this sentence prove Christ truly God. See Petavius, lib. 2. de Trin. chap. ix. num. 8.
That Jesus is the Christ, the promised Messias, the Redeemer of the world, is born of God, is made his adoptive son by his grace in baptism. (Witham)
Is born of God; that is, is justified, and become a child of God by baptism; which is also to be understood, provided the belief of this fundamental article of the Christian faith be accompanied with all the other conditions, which, by the word of God and his appointment, are also required for justification; such as a general belief of all that God has revealed and promised; hope, love, repentance, and a sincere disposition to keep God's holy law and commandments. (Challoner)
Loveth him that begot; i.e. the eternal Father.
Loveth him also who was born of him; i.e. loveth him who is his only begotten and eternal Son. (Witham)