Before commencing our examination of the evidence as to the date, authorship, and character of the Gospels, it may be well to make a few preliminary remarks, and clearly state certain canons of criticism. We shall make no attempt to establish any theory as to the date at which any of the Gospels was actually written, but simply examine all the testimony which is extant with the view of ascertaining what is known of these works and their authors, certainly and distinctly, as distinguished from what is merely conjectured or inferred. Modern opinion, in an Inquiry like ours, must not be mistaken for ancient evidence. We propose, therefore, as exhaustively as possible to search all the writings of the early Church for information regarding the Gospels, and to examine even the alleged indications of their use. It is very important, however, that the silence of early writers should receive as much attention as any supposed allusions to the Gospels. When such writers, quoting largely from the Old Testament and other sources, deal {213} with subjects which would naturally be assisted by reference to our Gospels, and still more so by quoting such works as authoritative,--and yet we find that not only they do not show any knowledge of those Gospels, but actually quote passages from unknown sources, or sayings of Jesus derived from tradition,--the inference must be that our Gospels were either unknown, or not recognized as works of authority at the time. It is still more important that we should constantly bear in mind, that a great number of Gospels existed in the early Church which are no longer extant, and of most of which even the names are lost. We need not here do more than refer, in corroboration of this fact, to the preliminary statement of the author of the third Gospel: "Forasmuch as many [--Greek--] took in hand to set forth in order a declaration of the things which have been accomplished among us," &c.(1) It is therefore evident that before our third Synoptic was written many similar works were already in circulation. Looking at the close similarity of large portions of the three Synoptics, it is almost certain that many of the writings here mentioned bore a close analogy to each other and to our Gospels, and this is known to have been the case, for instance, amongst the various forms of the "Gospel according to the Hebrews." When, therefore, in early writings, we meet with quotations closely resembling, or we may add, even identical with passages which are found in our Gospels, the source of which, however, is not mentioned, nor is any author's name indicated, the similarity or even identity cannot by any means be admitted as proof that the quotation is necessarily from our Gospels, and not from some other similar work {214}