All efforts must fail to apprehend the doctrines involved in the idea of the Trinity, which insist upon either the idea of personality or numeration, as they are understood by us. Watts, with the Bible in his hand, stood on the defensive against the aggressions of Arianism, and having attempted to unfold the Christian doctrine of the Trinity, he published his further dissertation, “The Arian Invited to the Orthodox Faith; a plain and easy method to lead such as deny the Proper Deity of Christ into the belief of that Article.” Those who charge Arianism upon Watts can only do so, because throughout the argument he has conducted it in a strain of eminent courtesy and charity. He approached the matter in no spirit of disputation, but with a cordial desire to promote, if possible, healing and unity; nor do we think that there are any indications, in the course of any of his discussions, that his own mind or faith was unhinged; but the discussions around him compelled him to direct his attention to questions certainly not uncongenial to his speculative and analytic order of mind. Probably the reader feels that there is a sufficient correspondence between the sense of our own spiritual wants and the revelation given to us in the Divine Word to make us feel that the Trinity of Persons in the Godhead is a necessity of our moral nature, and that it is a doctrine, as we have already intimated, best held, as most satisfactory to the mind and conscience, when held _im_plicitly rather than _ex_plicitly. The claim which the Unitarians put forth to find in Watts one of themselves is not less than audacious and dishonest. It is, however, founded—very ridiculously, we venture to think—upon some expressions reported after his death, which implied that he would have been willing, had he been able, to have altered some expressions in his hymns. Truly it is amazing that the author could survive the publication of his first volume forty years, and not alter many barbarisms of metre and expression. It may, perhaps, be partly accounted for from the fact that the copyright of the hymns had passed at once from his hands. We can very well believe there were certain expressions in his hymns he would have been not indisposed to alter, without touching at all upon matters of doctrine. It will be time enough for Unitarians to claim Watts when they are able to set aside his last published words, and to reconcile them with that faith which they call theirs, or to account, upon such principles as they would make him hold, for the sentiments which fell from his lips when dying.