It is Christ Who is the wisdom of God. In Him dwelleth all the fulness of the Godhead bodily. All the fulness was pleased to dwell in Him. He sanctified Himself that we might be sanctified through the truth. The Holy Ghost, having taken the things of Christ and revealed them unto the apostles, led them into all truth. Now all things that the Father hath are Christ's: therefore He has said that the Holy Ghost should take of His, and should show it unto them.
This being the case, the question of a subsequent development is judged. Is there anything more than the fulness of the Godhead? anything more than "all that the Father hath?" anything clearer than "the true light?" But it is this which is revealed. If one thinks of man whose ideas originate in himself, as a spider spins a web out of its own substance, development may no doubt be spoken of; but if the question is the revelation of Christ, by the gift of the true light already come, Christ does not increase. And, assuredly, we shall find nothing good outside "All that the Father hath given Him." This is what we possess by revelation — the development inherent in the communication of truth to man belongs to his capacity of reception (in this there is progress for each one of us), and to the manifestation of Christ, from the time of John the Baptist unto His full revelation by the Holy Ghost — a revelation which we posses in the New Testament. No tradition can add to the revelation of that which Christ is — no development can give us one new truth with respect to His fulness. But this is everything. It is thus that the lofty pretensions of man are brought to nothing.
J. N. Darby.