Background
Marie-Émile Boismard says the literary structure of the Prologue "forms a sort of parabola:"1
(a) The Word 1-2 ● ● 18 The Son in (a')
with God. the Father
(b) His role of 3 ● ● 17 Role of re- (b')
creation creation
(c) Gift to men 4-5 ● ● 16 Gift to men (c')
(d) Witness of J-B 6-8 ● ● 15 Witness of J-B (d')
(e) The coming of the 9-11 ● ● 14 The Incarnation (e')
Word into the World
●
(12-13)
(f) By the Incarnate Word we become children of God
Others have called Boismard's structure a chiasm, but his term was "construction by envelopment"2
because it mirrored the actual events:
...it becomes possible to grasp the internal movement which animates the whole Prologue: the thought leaves God, as so to return to God, after touching the earth. The Word was in God, with God; then he comes towards us men...He seems to detach himself from God who sends him forth, progressively, as if he intends to accustom men, little by little to his presence. Once he has come upon earth he communicates to us that divine life which makes us children of God; that is the centre of the Prologue, the bond of the New Alliance that the Word has come to tighten between God and men, Then the Word, called henceforward the only-begotten Son, reascends to the bosom of the Father, drawing us in his wake to lead us to God...3
Therefore, at a minimum, the ending should fulfill three things:
- be a fitting conclusion to the structure
- be in harmony with the beginning (it's corresponding pair)
- illuminate the central point.
To Expound and To Lead Out
The Prologue ends with ἐξηγέομαι:
No one has ever seen God; the only-born God, the One being in the bosom of the Father — that One expounded Him. (John 1:18) [DLNT]
θεὸν οὐδεὶς ἑώρακεν πώποτε μονογενὴς θεὸς ὁ ὢν εἰς τὸν κόλπον τοῦ πατρὸς ἐκεῖνος ἐξηγήσατο
This verb has two primary meanings: 1. to lead out, be leader, go before; 2. to draw out in narrative, unfold in teaching. Translators universally understand the use along the lines of the second and so it is rendered as "expounded" or similar. Thus, in John's Gospel the Father is "expounded" by Jesus. This is true in a number of ways. "Father" is used almost as often in John as Matthew, Mark, and Luke combined and John has many teachings not found elsewhere.
The other meaning also applies when ὁ ὢν is read as the name of God:
No one has ever seen God; the only God, THE ONE WHO IS, has himself led out into the bosom of the Father.4
This reading has two advantages over the first. It is uses the name to connect with the central point which is becoming children of God by believing in His name:
12 But all who did receive Him, He gave them — the ones believing in His name — the right to become children of God, 13 who were born not of bloods, nor of the will of the flesh, nor of the will of a husband, but of God.
Also, it is what Jesus said of Himself:
Then Jesus again spoke to them, saying, “I am the light of the world. The one following Me will never walk in the darkness, but will have the light of [c] life” (John 8:12)
c. John 8:12 That is, proceeding from; or, leading to.
If one follows Jesus, the (true) light of the world, they will have the light of life; Jesus will lead the children of God, to the bosom of the Father because they believe in His name. Or to put this in terms of verse 18:
No one has ever seen God. Only-begotten God [some manuscripts have Son], THE ONE WHO IS, in the bosom of the Father, He is leader [into the light of life].
The lack of the article parallels the nominative use of God in the opening:
(1) θεὸς ἦν ὁ λόγος (18) μονογενὴς θεὸς ὁ ὢν
God was the Word Only-begotten the ONE WHO IS
The Word was and the Only-Begotten God is.
Conclusion
Both readings can be justified. Jesus did expound and He was/is the leader: He did lead out. Yet only believers are led into the bosom of the Father.
His return to the Father which in turn resulted in the Holy Spirit being given to believers, serves as continuing evidence, an on going expounding (and leading), which may or may not produce followers of Christ (and so be led to the Father). Thus we might modify Boismard's structure to show the either/or affect of the Incarnation on creation:
(a) The Word 1-2 ● ● 18 The Son in (a')
with God. the Father
(b) His role of 3 ● ● 17 Role of re- (b')
creation creation
(c) Gift to men 4-5 ● ● 16 Gift to men (c')
(d) Witness of J-B 6-8 ● ● 15 Witness of J-B (d')
(e) The coming of the 9-10 ● ● 14 The Incarnation (e')
Word into the World
●
(f) His own which reject 11 | 12-13 By the incarnate (f')
Him remain born of | Word we become
bloods or will of the | children of God
flesh or will of man |
The Word was, and so is past. Yet by its very nature (God) becoming flesh created on-going light which still leads people to life, or not. So it may be better to include verse 11 with the central point which is divided into two parts:
(f) He came to His own things, and His own ones did not accept Him.
(f') But all who did receive Him, He gave them — the ones believing in His name — the right to become children of God, who were born not of bloods, nor of the will of the flesh, nor of the will of a husband, but of God.
This allows for the central them to reflect the coexistent reality of the Incarnation. Just as believing in the name has a consequence, so does rejecting Him.
Notes:
1. M. E. Boismard, O.P. St. John's Prologue, translated by Carisbrooke Dominicans, Newman Press, 1957, p. 80
2. Ibid., p. 79.
3. Ibid.
4. Robert G Hall, "The Reader as Apocalyptist in the Gospel of John". John's Gospel and Intimations of Apocalyptic, edited by Catrin H Williams and Christopher Rowland, Bloomsbury, 2013, p. 268