In his preface to the first edition of the book, he says:--"Many circumstances might be mentioned, which, in their associations, have induced me to write and publish the following treatise; but I can say with propriety, that the principal object was that in which I always find the greatest happiness, namely, to do what I find most necessary in order to render myself useful to mankind." At the time of the publication of this "Treatise," Mr. Ballou had by no means arrived at such a degree of understanding and belief upon the subject of the Scriptures as was the case in after years, and, with wise fore-thought, he thus speaks his mind in the preface to the first edition:-- "I have often been solicited to write and publish my general views on the gospel, but have commonly observed to my friends that it might be attended with disagreeable consequences, as it is impossible to determine whether the ideas we entertain at the present time are agreeable to those which we shall be under the necessity of adopting after we have had more experience; and knowing, to my satisfaction, that authors are very apt to feel such an attachment to sentiments which have been openly avowed to the world, that their prejudice frequently obstructs their further acquisition in the knowledge of the truth, and even in cases of conviction their own self-importance will keep them from acknowledging their mistake." Though he was thus cautious (and what judgment, prudence, and cool reasoning are evinced in this paragraph), the only change that experience did bring about, in the author's mind, was, that he became even more fully convinced, as the experience of years ripened the harvest of his wisdom, of the truths of his former belief, and made still further _progress_ (a word that he loved and lived up to), in addition to certain points that are but lightly touched upon in the work. The following letter, relating to this and other works, was elicited by the presentation to Mr. Ballou of a set, in a new and uniform edition with some of his subsequent publications; the constant call for these books, even after several large editions had been exhausted, and a long period of years had elapsed since their first being issued, requiring this fresh publication of them. Mr. Ballou having parted with the copyright at the time of publication, they were of course in the hands of the trade. This letter is introduced here as illustrative of the humble estimate he put upon his own important labors and discoveries, and is also in style very like him. It bears date 1844, and was written, consequently, when he was seventy-three years of age. It was addressed to the editor of the Trumpet, and appeared in the editorial columns of that paper.