John Calvin on 1 John 2:23

Now this is a remarkable sentence, and ought to be reckoned among the first axioms of our religion. yea, when we have confessed that there is one true God, this second article ought necessarily to be added, that he is no other but he who is made known in Christ. The Apostle does not here treat distinctly of the unity of essence. It is, indeed, certain, that the Son cannot be disunited from the Father, for he is of the same essence, (ὁμοούσιος;) but another thing is spoken of here, that is, that the Father, who is invisible, has revealed himself only in his Son. Hence he is called the image of the Father, (Hebrews 1:3,) because he sets forth and exhibits to us all that is necessary to be known of the Father. For the naked majesty of God would, by its immense brightness, ever dazzle our eyes; it is therefore necessary for us to look on Christ. This is to come to the light, which is justly said to be otherwise inaccessible.

I say, again, that there is not here a distinct discussion respecting the eternal essence of Christ, which he has in common with the Father. This passage is, indeed, abundantly sufficient to prove it: but John calls us to this practical part of faith, that as God has given himself to us to be enjoyed only in Christ, he is elsewhere sought for in vain; or (if any one prefers what is clearer) that as in Christ dwells all the fullness of the Deity, there is no God apart from him. It hence follows, that Turks, Jews, and such as are like them, have a mere idol and not the true God. For by whatever titles they may honor the God whom they worship, still, as they reject him without whom they cannot come to God, and in whom God has really manifested himself to us, what have they but some creature or fiction of their own? They may flatter themselves as much as they please, with their own speculations, who, without Christ, philosophize on divine things; it is still certain that they do nothing but rave and rant, because, as Paul says, they hold not the Head. (Colossians 2:19.) It is obvious, hence, to conclude how necessary is the knowledge of Christ.

Many copies have the opposite sentence, “He who confesses the Son,” etc. But as I think that a note by some copyist has crept into the text, I hesitated not to omit it. The words are found in most of the MSS., and in most of the versions, and in many of the Fathers. Besides, they wholly comport with the usual style of the Apostle, whose common practice it was to state things positively and negatively, and vice versa. Sec especially chap. 5:12. — Ed. But if its insertion be approved, the meaning would be, that there is no right confession of God except the Father be acknowledged in the Son.

Were any one to object and say, that many of the ancients thought rightly of God, to whom Christ was not known: I allow that the knowledge of Christ has not been always so explicitly revealed, nevertheless, I contend that it has been always true, that as the light of the sun comes to us by its rays, so the knowledge of God has been communicated through Christ.

1 John 2:24-29

24. Let that therefore abide in you, which ye have heard from the beginning. If that which ye have heard from the beginning shall remain in you, ye also shall continue in the Son, and in the Father.

24. Ergo quod audistis ab initio, in vobis maneat: si in vobis manserit quod ab initio audistis, et vos in Patre et Filio manebitis.

25. And this is the promise that he hath promised us, even eternal life.

25. Atque haec est promissio, quam ipse nobis promisit, nempe vitae eternae (vel, quam nobis pollicitus est vitam eternam.)

26. These things have I written unto you concerning them that seduce you.

26. Haec scripsi vobis de iis qui seducunt vos.

27. But the anointing which ye have received of him abideth in you, and ye need not that any man teach you: but as the same anointing teacheth you of all things, and is truth, and is no lie, and even as it hath taught you, ye shall abide in him.

27. Et unctio quam accepistis ab eo, in vobis manet; neque opus habetis ut quis vos doceat; sed quemadmodum unctio docet vos de omnibus, et veritas est, et non est mendacium; et quemadmodum docuit vos, manete in eo (vel, in ea.)

28. And now, little children, abide in him; that, when he shall appear, we may have confidence, and not be ashamed before him at his coming.

28. Et nunc filioli, manete in eo, ut quum apparuerit, habeamus fiduciam, neque pudefiamus ab ejus praesentia.

29. If ye know that he is righteous, ye know that every one that doeth righteousness is born of him.

29. Si nostis quod justus sit, cognoscite quod quisquis facit justitiam ex eo genitus est.