This —
Ουτος,
he, namely, Christ, the person last mentioned;
is the true God and eternal life , benson
(1) the grammatical construction favors it. Christ is the immediate antecedent of the pronoun "this" - οὗτος houtos. This would be regarded as the obvious and certain construction so far as the grammar is concerned, unless there were something in the thing affirmed which led us to seek some more remote and less obvious antecedent. No doubt would have been ever entertained on this point, if it had not been for the reluctance to admit that the Lord Jesus is the true God. If the assertion had been that "this is the true Messiah;" or that "this is the Son of God;" or that "this is he who was born of the Virgin Mary," there would have been no difficulty in the construction. I admit that his argument is not absolutely decisive; for cases do occur where a pronoun refers, not to the immediate antecedent, but to one more remote; but cases of that kind depend on the ground of necessity, and can be applied only when it would be a clear violation of the sense of the author to refer it to the immediate antecedent.
(2) this construction seems to be demanded by the adjunct which John has assigned to the phrase "the true God" - "eternal life." This is an expression which John would be likely to apply to the Lord Jesus, considered as "life," and the "source of life," and not to God as such. "How familiar is this language with John, as applied to Christ! "In him (i. e. Christ) was life, and the life was the light of people - giving life to the world - the bread of life - my words are spirit and life - I am the way, and the truth, and the life. This life (Christ) was manifested, and we have "seen it," and do testify to you, and declare the eternal life which was with the Father, and was manifested to us,"
1 John 1:2." - Prof. Stuart's Letters to Dr. Channing, p. 83. There is no instance in the writings of John, in which the appellation life, and "eternal" life is bestowed upon the Father, to designate him as the author of spiritual and eternal life; and as this occurs so frequently in John's writings as applied to Christ, the laws of exegesis require that both the phrase "the true God," and "eternal life," should be applied to him.
(3) if it refers to God as such, or to the word "true" - τὸν ἀληθινόν (Θεὸν) ton alēthinon (Theon) it would be mere tautology, or a mere truism. The rendering would then be, "That we may know the true God, and we are in the true God: this is the true God, and eternal life." Can we believe that an inspired man would affirm gravely, and with so much solemnity, and as if it were a truth of so much magnitude, that the true God is the true God?
(4) this interpretation accords with what we are sure John would affirm respecting the Lord Jesus Christ. Can there be any doubt that he who said, "In the beginning was the Word, and the Word was with God, and the Word was God;" that he who said, "all things were made by him, and without him was not anything made that was made;" that he who recorded the declaration of the Saviour, "I and my Father are one," and the declaration of Thomas, "my Lord and my God," would apply to him the appellation "the true God!"
(5) if John did not mean to affirm this, he has made use of an expression which was liable to be misunderstood, and which, as facts have shown, would be misconstrued by the great portion of those who might read what he had written; and, moreover, an expression that would lead to the very sin against which he endeavors to guard in the next verse - the sin of substituting a creature in the place of God, and rendering to another the honor due to him. The language which he uses is just such as, according to its natural interpretation, would lead people to worship one as the true God who is not the true God, unless the Lord Jesus be divine. For these reasons, it seems to me that the fair interpretation of this passage demands that it should be understood as referring to the Lord Jesus Christ.Barnes
This is the true God—"This Jesus Christ (the last-named Person) is the true God" (identifying Him thus with the Father in His attribute, "the only true God," Joh 17:3, primarily attributed to the Father).JFB
the true God, as
John 17:3, so as thereby to be drawn into union with him, and to be
in him: or, which in effect is the same thing, (so entire is the oneness between the Father and the Son),
we are in his Son Jesus Christ, who also
is the true God, as
John 1:1, Poole
This is the true God and eternal life; that is, the Son of God, who is the immediate antecedent to the relative "this"; he is the true God, with his Father and the Spirit, in distinction from all false, fictitious, or nominal deities; and such as are only by office, or in an improper and figurative sense: Christ is truly and really God, as appears from all the perfections of deity, the fulness of the Godhead being in him; from the divine works of creation and providence being ascribed to him; and from the divine worship that is given him; as well as from the names and titles he goes by, and particularly that of Jehovah, which is incommunicable to a creature; and he is called "eternal life", because it is in him; and he is the giver of it to his people; and that itself will chiefly consist in the enjoyment and vision of him, and in conformity to him.Gill
1 John 5:20.
Ἥκει)
is come. Thus,
ἡκω,
Mark 8:3, note.—
δέδωκεν,
has given) that is,
God: for in the preceding clause also the subject is by implication
God, in this sense:
God sent his own Son: and to this is referred
αὐτοῦ,
of Him, which presently follows.—
διάνοιαν,
understanding) not only knowledge, but the faculty of knowing.—
τὸν ἀληθινὸν,
the True One) Understand,
His Son Jesus Christ: as presently afterwards. Whence it is perceived with what great majesty the Son thus entitles Himself:
Revelation 3:7.—
οὗτος)
This, the True One, the Son of God Jesus Christ: to whom the title of
Life eternal is befitting.—
ζωὴ αἰώνιος,
Life eternal) The beginning and the end of the Epistle are in close agreement.Bengel
The final sentence of verse 20 runs:
He is the true God and eternal life. To whom does
he refer? Grammatically speaking, it would normally refer to the nearest preceding subject, namely
his Son Jesus Christ. If so, this would be the most unequivocal statement of the deity of Jesus Christ in the New Testament, which the champions of orthodoxy were quick to exploit against the heresy of Arius. Luther and Calvin adopted this view.
[1] Stott