. . . the unbelieving Jews, in the time of the Apostles, opposed Christianity with the utmost bitterness and passion. They sought on every side for objections to it. There was much in its character to which the believing Jews could hardly be reconciled. The Epistles are full of statements, explanations, and controversy, relating to questions having their origin in Jewish prejudices and passions. With regard however to this doctrine [the Trinity], which if it had ever been taught, the believing Jews must have received with the utmost difficulty, and to which the unbelieving Jews would have manifested the most determined opposition,-with regard to this doctrine, there is not trace of any controversy. But, if it had ever been taught, it must have been the main point of attack and defense between those who assailed, and those who supported Christianity. There is nothing ever said in its explanation. But it must have required, far more than any other doctrine, to be explained, illustrated, and enforced; for it appears, not only irreconcilable with the doctrine of the Unity of God, but equally so with that of the humanity of our Saviour; and yet both these doctrines, it seems, were to be maintained in connexion with it. It must have been necessary, therefore, to state it as clearly as possible, to exhibit it in its relations, and carefully to guard against the misapprehensions to which it is so liable on every side. Especially must care have been taken to prevent the gross mistakes into which the Gentile converts from polytheism were likely to fall. Yet so far from any such clearness of statement and fulness of explanation, the whole language of the New Testament in relation to this subject is . . . a series of enigmas, upon the supposition of its truth. The doctrine, then, is never defended in the New Testament, though unquestionably it would have been the main object of attack, and the main difficulty in the Christian system. It is never explained, though no doctrine could have been so much in need of explanation. On the contrary, upon the supposition of its truth, the Apostles express themselves in such a manner, that it had been their purpose to darken and perplex the subject, they could not have done it more effectually. And still more, this doctrine is never insisted upon as a necessary article of faith; though it is now represented by its defenders as lying at the foundation of Christianity.