The Johannine Prologue (John 1:1-18) is a purple passage of the bible, and "In the beginning was the Word (λόγος), and the Word (λόγος) was with God, and the Word (λόγος) was God." (John 1:1 RSV) is among the most famous verses in the entire bible. The original Greek of John uses the ancient Stoic term λόγος (logos), which is translated as 'Word' in most all modern English translations, and occasionally as 'Speech' in some older translations. A myriad of books have been written on John's use of this Neo-Platonic and Stoic term.
John's employment of λόγος (logos) in John 1:14 is especially signification for the Christian formation of the doctrines of the Trinity and Incarnation. "And the Word (λόγος) became flesh and dwelt among us, full of grace and truth; we have beheld his glory, glory as of the only Son from the Father." (John 1:14 RSV). A surface reading may suggest that the second person of the Trinity (i.e. the λόγος) existed in a pre-incarnate and eternal form, and then at some point in history the second person assumed a human nature at the Incarnation.
The older orthodox Reformed Theologians saw a two phase life of the Second Person of the Trinity, first existing as the eternal λόγος and then a temporal appearance of the incarnate word. In a famous commentary on the Johannine Prologue in Karl Barth's Church Dogmatics Vol IV/2, Barth shows that there is no such thing as a λόγος ἄσαρκος (unincarnate Word). There is no such thing as a pre-incarnate or un-incarnate Word, and the most we may speak of an unfleshed Word is a logos incarnandus, which means 'a Word that will be incarnated'.
Karl Barth's brilliant exegesis has demonstrated that there is no "God behind God" that is unknown to us in the logos asarkos myth. The image of the invisible God, as Paul spoke, has always been the Crucified and Resurrected Jesus Christ, and if we imagine any logos asarkos, we must quickly speaks of it only as a logos incarnandus. Barth's following quotation has the great benefit, in that it does not fall into Lessing's Great Ugly Ditch, like the older Reformed explanation. Barth places the incarnation before all history, rather than being merely a contingent historical datum.
He "is the image of the invisible God, the firstborn of every creature: For by him were all things created, that are in heaven, and that are in earth, visible and invisible ... all things were created by him and for him: And he is before all things, and by him all things consist" (Col 1:15f.). It is to be noted that the One of whom all this is said is called "the head of the body, the church" and " the first-born from the dead" in Col 1:18, and that according to Col 1:20 it can be said of Him, this autos, that it pleased the Father in Him to reconcile all things to himself, "having made peace through the blood of his cross." But there could obviously be no sense in talking of the blood of the eternal Son of God as such, or of this Son as the firstborn from the dead. The declarations of predestination from Col 1:15 onwards cannot, therefore, relate only to the Son of God, to a logos asarkos.
But, again, the statement in John 1:2: "The same (autos en) was in the beginning with God," would be a meaningless repetition of the second statement in John 1:1 if it were not an anticipation of the incarnate Logos attested and declared by John the Baptist in the words: "This was he (outs en) who coming after me is preferred before me, for he was before me" (protos mou en). The result is that we cannot possibly refer abstractly to the eternal Logos either John 1:3: "All things were made by him; and without him (chorus auto) was not anything made that was made," or John 1:10 : "The world was made by him." The event attested in John 1:14 is one to which the whole Prologue looks back. So, then, the whole Prologue (with the possible exception of the first phrase of John 1:1) -- although it certainly speaks of the eternal Logos -- speaks also of the man Jesus. The saying in John 8:58, which reaches back to the Prologue: "Before Abraham was, I am," must be understood in the same way. And nothing could be more explicit than the way in which, in John 6:51, "the living bread which came down from heaven" is equated with" my flesh, which I will give for the life of the world."
But the same is true of Heb 1:2f., where it is said of the Son that by Him God made the aeons (the worlds), that He is "the brightness of his glory, and the express image of his person," and that He upholds "all things by the word of his power." For immediately after we are told that "when he had by himself purged our sins, he sat down on the right hand of the majesty in high," and (in Heb 1:4) is "made so much better than the angels, as he hath by inheritance obtained a more excellent name than they." This and the many statements which follow concerning his superiority to the angels would be quite inexplicable if the reference were only abstractly to the eternal Son of God, and He were supposed to stand in need of this exaltation and the inheritance of this more excellent name. Indeed, how could the eternal Son as such be put (in Heb 1:1) in the same series with the fathers by whom God spoke at sundry times and in divers manners? How could it be said of Him as such that God "hath in these last days spoken unto us" by Him? This is only explicable if, as is expressly emphasised in Heb 1:6, the reference is to the One who is brought into the world of men, the oikoumena, and therefore to the One who is both Son of God and Son of Man He as such is the One by whom God made the aeons, and who upholds all things by the Word of His power.
And so the One who (in 1 Pet 1:29) "verily was foreordained before the foundation of the world, but was manifest in these last times," is obviously the One of whom it is said to the readers in 1 Peter 1:18-19 that they are redeemed with His blood "as of a lamb without blemish and without spot." Again, the One of whom it is said in Eph 1:4 that God "hath chosen us in him before the foundation of the world, that we should be holy and without blame before him" is the One of whom it is said again in Eph 1:7 that we have redemption through His blood. Again, in Rev 13:8, the book of life written before the foundation of the world (which does not contain the names of those who worship the beast) is called the book of the Lamb slain. In all these predestinarian passages the emphasising of the blood, of the putting to death, of Jesus Christ is obviously inexplicable if they are referred to a logos asarkos, and not to the eternal Son of God and therefore also to the Son of Man existing in time.
Barth, Karl. Church Dogmatics Study Edition 24. London: T & T Clark, 2010. 33-34. Print.