But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanses us from all sin.
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Augustine of Hippo
AD 430
Let us not say that we have fellowship with Him, if we walk in darkness. If we walk in the light, as He is in the light, we have fellowship one with another. 1 John 1:7 Let us walk in the light, as He is in the light, that we may be able to have fellowship with Him. And what are we to do about our sins? Hear what follows, And the blood of Jesus Christ His Son shall purge us from all sin. Great assurance has God given! Well may we celebrate the Passover, wherein was shed the blood of the Lord, by which we are cleansed from all sin! Let us be assured: the handwriting which was against us, Colossians 2:14 the bond of our slavery, the devil held, but by the blood of Christ it is blotted out. The blood, says he, of His Son shall purge us from all sin. What means, from all sin? Mark: lo even now, in the name of Christ whom these here have now confessed, who are called infants, have all their sins been cleansed. They came in old, they went out new. How, came in old, went out new? Old men they...
Because there are Three which bear witness in Heaven, &c. S. John here more fully explains and confirms the testimony already adduced of the water, the blood and the spirit concerning Christ. The particle because is partly confirmatory of what He had said in the5th ver. that Jesus is the Son of God, partly of what he said in the6th, that the Spirit bears witness that Jesus is true God. For this is here confirmed because the Holy Spirit is one of the three witnesses who in heaven bear testimony to Christ.
S. Jerome (Pref. in Epist. Canon.) observes that this verse had been erased by unbelievers, i.e. the Arians, from some Greek copies. Therefore it is not found in the Syriac, Clement of Alexandria, Bede, Å’cumenius, and some others. It Isaiah , however, the constant reading of the Latin Bibles, and the more correct Greek MSS. and of many of the ancients, SS. Athanasius, Augustine, Jerome, Cyprian, the Lateran Council, at which Greeks were present. Therefore it is certain that these wor...