It is apparent, then, why John chooses this title to designate Christ in His pre-existent life. No other title brings out so clearly the identification of Christ with God, and the function of Christ to reveal God. It was a term which made the transition easy from Jewish Monotheism to Christian Trinitarianism. Being already used by the strictest Monotheists to denote a spiritual intermediary between God and the world, it is chosen by John as the appropriate title of Him through whom all revelation of God in the past has been mediated, and who has at length finished revelation in the person of Jesus Christ. The term itself does not explicitly affirm personality; but what it helps us to understand is, that this same Being, the Word, who manifested and uttered God in creation, reveals Him now in humanity. John wishes to bring the incarnation and the new spiritual world it produced into line with the creation and God's original purpose therein. He wishes to show us that this greatest manifestation of God is not an abrupt departure from previous methods, but is the culminating expression of methods and principles which have ever governed the activity of God. Jesus Christ, who reveals the Father now in human nature, is the same Agent as has ever been expressing and giving effect to the Father's will in the creation and government of all things. The same Word who now utters God in and through human nature, has ever been uttering Him in all His works.
All that God has done is to be found in the universe, partly visible and partly known to us. There God may be found, because there He has uttered Himself. But science tells us that in this universe there has been a gradual development from lower to higher, from imperfect towards perfect worlds; and it tells us that man is the last result of this process. In man the creature at last becomes intelligent, self-conscious, endowed with will, capable to some extent of meeting and understanding its Creator. Man is the last and fullest expression of God's thought, for in man and man's history God finds room for the utterance not merely of His wisdom and power, but of what is most profoundly spiritual and moral in His nature. In man God finds a creature who can sympathise with His purposes, who can respond to His love, who can give exercise to the whole fulness of God.
But in saying that "the Word become flesh" John says much more than that God through the Word created man, and found thus a more perfect means of revealing Himself. The Word created the visible world, but He did not become the visible world. The Word created all men, but He did not become the human race, but one Man, Christ Jesus. No doubt it is true that all men in their measure reveal God, and it is conceivable that some individual should fully illustrate all that God meant to reveal by human nature. It is conceivable that God should so sway a man's will and purify his character that the human will should be from first to last in perfect harmony with the Divine, and that the human character should exhibit the character of God. An ideal man might have been created, God's ideal of man might have been realized, and still we should have had no incarnation. For a perfect man is not all we have in Christ. A perfect man is one thing, the Word Incarnate is another. In the one the personality, the "I" that uses the human nature, is human; in the other, the personality, the "I," is Divine.
By becoming flesh the Word submitted to certain limitations, perhaps impossible for us to define. While in the flesh He could reveal only what human nature was competent to reveal. But as the human nature had been created in the likeness of the Divine, and as, therefore, "good" and "evil" meant the same to man as to God, the limitation would not be felt in the region of character.