The Jews might have alleged that they served not the false gods of the Gentiles, but the God of Israel; and that they used images when they worshipped Him only that they might have before their eyes, like other nations, some beautiful object. This delusive notion is here reprobated; and they were taught that there is neither likeness nor equality betwixt the true God and these foolish pretended resemblances made of Him by the hands of men. (R. Macculloch.)
God incomprehensible by mere reason
God asserts an immeasurable difference between Himself and all created beings.
1. We distinguish the Creator from every creature by declaring Him self-existent. There is no way of accounting for the origin of everything except by supposing something which never had origin. Nothing could have begun to be unless there had been something which never began to be. Here is the grand distinction between the Creator and the creature: the being of the one is underived, and that of the other derived. The existence of all creatures is a dependent existence; it has been imparted by another, and may be withdrawn by that other. The existence of the Creator is a necessary existence, altogether independent, indebted to none for commencement, and resting on none for continuance. It is by His name Jehovah--that name which breathes self-existence--that God proclaims Himself inscrutable and unimaginable.
2. We learn from this the vanity of all attempts to explain or illustrate the Trinity in Unity. If we were able to produce exact instances of the union of three in one, we should have no right to point it out as at all parallel with the union of the Godhead. We ought to know beforehand that the created can furnish no delineation of the uncreated; so that it shows a forgetfulness of the self-existence of God to seek His resemblance in what He hath called into being. He best shows the workings of a sound judgment and ripened intellect who, in such a matter as the doctrine of the Trinity, submits to the disclosures of revelation, and receives it on the authority of God, though unable to explain it through any reasoning of his own. The doctrine of the Trinity is above reason, but it is not against reason.
3. Consider the paramount importance of the doctrine of the Trinity. The doctrine of the Trinity is so bound up with the whole of Christianity, that to think of removing it and yet of preserving the religion is to think of taking from the body all its sinew and its bone, and yet leaving it all its symmetry and its strength. The whole falls to pieces if you destroy this doctrine. The short but irresistible way of proving that the doctrine of the Trinity is in the largest sense a practical doctrine is to remind you that if this doctrine be false, Jesus Christ is nothing more than a man and the Holy Spirit nothing more than a principle or quality. To remove the doctrine of the Trinity is to remove whatever is peculiar to Christianity, to reduce the religion to a system of loftier morals and stronger sanctions than the world before possessed; but, nevertheless, having nothing to deserve the name of Gospel, because containing no tidings of an expiation for sin. (H. Melvill, B. D.)
