B. It is essential to any proper revelation.
If there be no Trinity, Christ is not God, and cannot perfectly know or reveal God. Christianity is no longer the one, all-inclusive, and final revelation, but only one of many conflicting and competing systems, each of which has its portion of truth, but also its portion of error. So too with the Holy Spirit. “As God can be revealed only through God, so also can he be appropriated only through God. If the Holy Spirit be not God, then the love and self-communication of God to the human soul are not a reality.” In other words, without the doctrine of the Trinity we go back to mere natural religion and the far-off God of deism,—and this is ultimately exchanged for pantheism in the way already mentioned.
Martensen, Dogmatics, 104; Thomasius, Christi Person und Werk, 156. If Christ be not God, he cannot perfectly know himself, and his testimony to himself has no independent authority. In prayer the Christian has practical evidence of the Trinity, and can see the value of the doctrine; for he comes to God the Father, pleading the name of Christ, and taught how to pray aright by the Holy Spirit. It is impossible to identify the Father with either the Son or the Spirit. See Rom. 8:27—“he that searcheth the hearts[i. e., God] knoweth what is the mind of the Spirit, because he maketh intercession for the saints according to the will of God.” See also Godet on John 1:18—“No man hath seen God at any time; the only begotten Son, who is in the bosom of the Father, he hath declared him”; notice here the relation between ὁ ὤν and ἐξηγήσατο. Napoleon I: “Christianity says with simplicity, ‘No man hath seen God, except God.’ ” John 16:15—“All things whatsoever the Father hath are mine: therefore said I, that he taketh of mine, and shall declare it unto you”; here Christ claims for himself all that belongs to God, and then declares that the Holy Spirit shall reveal him. Only a divine Spirit can do this, even as only a divine Christ can put out an unpresumptuous hand to take all that belongs to the Father. See also Westcott, on John 14:9—“he that hath seen me hath seen the Father; how sayest thou, Show us the Father?”
The agnostic is perfectly correct in his conclusions, if there be no Christ, no medium of communication, no principle of revelation in the Godhead. Only the Son has revealed the Father. Even Royce, in his Spirit of Modern Philosophy, speaks of the existence of an infinite Self, or Logos, or World-mind, of which all individual minds are parts or bits, and of whose timeless choice we partake. Some such principle in the divine nature must be assumed, if Christianity is the complete and sufficient revelation of God's will to men. The Unitarian view regards the religion of Christ as only “one of the day's works of humanity”—an evanescent moment in the ceaseless advance of the race. The Christian on the other hand regards Christ as the only Revealer of God, the only God with whom we have to do, the final authority in religion, the source of all truth and the judge of all mankind. “Heaven and earth shall pass away, but my words shall not pass [pg 350]away” (Mat. 24:35). The resurrection of just and unjust shall be his work (John 5:28), and future retribution shall be “the wrath of the Lamb” (Rev. 6:16). Since God never thinks, says, or does any thing, except through Christ, and since Christ does his work in human hearts only through the Holy Spirit, we may conclude that the doctrine of the Trinity is essential to any proper revelation.
C. It is essential to any proper redemption.
If God be absolutely and simply one, there can be no mediation or atonement, since between God and the most exalted creature the gulf is infinite. Christ cannot bring us nearer to God than he is himself. Only one who is God can reconcile us to God. So, too, only one who is God can purify our souls. A God who is only unity, but in whom is no plurality, may be our Judge, but, so far as we can see, cannot be our Savior or our Sanctifier.
“God is the way to himself.” “Nothing human holds good before God, and nothing but God himself can satisfy God.” The best method of arguing with Unitarians, therefore, is to rouse the sense of sin; for the soul that has any proper conviction of its sins feels that only an infinite Redeemer can ever save it. On the other hand, a slight estimate of sin is logically connected with a low view of the dignity of Christ. Twesten, translated in Bib. Sac., 3:510—“It would seem to be not a mere accident that Pelagianism, when logically carried out, as for example among the Socinians, has also always led to Unitarianism.” In the reverse order, too, it is manifest that rejection of the deity of Christ must tend to render more superficial men's views of the sin and guilt and punishment from which Christ came to save them, and with this to deaden religious feeling and to cut the sinews of all evangelistic and missionary effort (John 12:44; Heb. 10:26). See Arthur, on the Divinity of our Lord in relation to his work of Atonement, in Present Day Tracts, 6: no. 35; Ellis, quoted by Watson, Theol. Inst., 23; Gunsaulus, Transfig. of Christ, 13—“We have tried to see God in the light of nature, while he said: ‘In thy light shall we see light’ (Ps. 36:9).” We should see nature in the light of Christ. Eternal life is attained only through the knowledge of God in Christ (John 16:9). Hence to accept Christ is to accept God; to reject Christ is to turn one's back on God: John 12:44—“He that believeth on me, believeth not on me, but on him that sent me”; Heb. 10:26, 29—“there remaineth no more a sacrifice for sin ... [for him] who hath trodden under foot the Son of God.”
In The Heart of Midlothian, Jeanie Deans goes to London to secure pardon for her sister. She cannot in her peasant attire go direct to the King, for he will not receive her. She goes to a Scotch housekeeper in London; through him to the Duke of Argyle; through him to the Queen; through the Queen she gets pardon from the King, whom she never sees. This was mediæval mediatorship. But now we come directly to Christ, and this suffices us, because he is himself God (The Outlook). A man once went into the cell of a convicted murderer, at the request of the murderer's wife and pleaded with him to confess his crime and accept Christ, but the murderer refused. The seeming clergyman was the Governor, with a pardon which he had designed to bestow in case he found the murderer penitent. A. H. Strong, Christ in Creation, 86—“I have heard that, during our Civil War, a swaggering, drunken, blaspheming officer insulted and almost drove from the dock at Alexandria, a plain unoffending man in citizen's dress; but I have also heard that that same officer turned pale, fell on his knees, and begged for mercy, when the plain man demanded his sword, put him under arrest and made himself known as General Grant. So we may abuse and reject the Lord Jesus Christ, and fancy that we can ignore his claims and disobey his commands with impunity; but it will seem a more serious thing when we find at the last that he whom we have abused and rejected is none other than the living God before whose judgment bar we are to stand.”
Henry B. Smith began life under Unitarian influences, and had strong prejudices against evangelical doctrine, especially the doctrines of human depravity and of the divinity of Christ. In his Senior year in College he was converted. Cyrus Hamlin says: “I regard Smith's conversion as the most remarkable event in College in my day.” Doubts of depravity vanished with one glimpse into his own heart; and doubts about Christ's divinity could not hold their own against the confession: “Of one thing I feel assured: I need an infinite Savior.” Here is the ultimate strength of Trinitarian doctrine. When the Holy Spirit convinces a man of his sin, and brings him face to face with the outraged holiness and love of God, he is moved to cry from the depths of his soul: “None but an infinite Savior can ever save me!” Only in a divine Christ—Christ [pg 351] for us upon the Cross, and Christ in us by his Spirit—can the convicted soul find peace and rest. And so every revival of true religion gives a new impulse to the Trinitarian doctrine. Henry B. Smith wrote in his later life: “When the doctrine of the Trinity was abandoned, other articles of the faith, such as the atonement and regeneration, have almost always followed, by logical necessity, as, when one draws the wire from a necklace of gems, the gems all fall asunder.”
D. It is essential to any proper model for human life.