The full title of this work is as follows: The Diegesis: being a discovery of the origin, evidences and early history of Christianity, never before or elsewhere so fully and faithfully set forth.
This is a very rare book as a WorldCat search on December 23, 2014 reveals that there are only 10 academic libraries in the world that have a copy of this 1894 E. Mendum edition of this work. E. Mendum is Ernest Mendum, the son of Josiah P Mendum (1839 - 1891) who took over the publication of the Boston Investigator after its founding publisher, Abner Kneeland (1774 - 1844) died.
Quoted from the "Prolegomena:"
"ON all hands 'tis admitted that the Christian religion is matter of most serious importance: it is so, if it be truth, because in that truth a law of faith and conduct measuring out to us a propriety of sentiment and action, which would otherwise not be incumbent upon us, is propounded to our observance in this life; and eternal consequences of happiness or of misery, are at issue upon our observance or neglect of that law."
"To deny to the Christian religion such a degree of importance, is not only to launch the keenest sarcasm against its whole apparatus of supernatural phenomena, but is virtually to withdraw its claims and pretensions altogether. For if men, after having received a divine revelation, are brought to know no more than what they knew before, nor are obliged to do any thing which otherwise they would not have been equally obliged to do; nor have any other consequences of their conduct to hope or fear, than otherwise would have been equally to be
hoped or feared; then doth the divine revelation reveal nothing, and all the pretence thereto, is driven into an admission of being a misuse of language. On the other hand, the Christian religion is of scarce less importance, if it be false; because, no wise and good man could possibly be indifferent or unconcerned to the prevalence of an extensive and general delusion."