But if, as I believe to be the case, beyond any rational doubt or dispute, the second gospel is the nearest extant representative of the oldest tradition, whether written or oral, how comes it that it contains neither the “Sermon on the Mount” nor the “Lord’s Prayer,” those typical embodiments, according to Dr. Wace, of the “essential belief and cardinal teaching” of Jesus?  Not only does “Mark’s” gospel fail to contain the “Sermon on the Mount,” or anything but a very few of the sayings contained in that collection; but, at the point of the history of Jesus where the “Sermon” occurs in “Matthew,” there is in “Mark” an apparently unbroken narrative from the calling of James and John to the healing of Simon’s wife’s mother.  Thus the oldest tradition not only ignores the “Sermon on the Mount,” but, by implication, raises a probability against its being delivered when and where the later “Matthew” inserts it in his compilation.

And still more weighty is the fact that the third gospel, the author of which tells us that he wrote after “many” others had “taken in hand” the same enterprise; who should therefore have known the first gospel (if it existed), and was bound to pay to it the deference due to the work of an apostolic eye-witness (if he had any reason for thinking it was so)—­this writer, who exhibits far more literary competence than the other two, ignores any “Sermon on the Mount,” such as that reported by “Matthew,” just as much as the oldest authority does.  Yet “Luke” has a great many passages identical, or parallel, with those in “Matthew’s” “Sermon on the Mount,” which are, for the most part, scattered about in a totally different connection.

Interposed, however, between the nomination of the Apostles and a visit to Capernaum; occupying, therefore, a place which answers to that of the “Sermon on the Mount,” in the first gospel, there is, in the third gospel a discourse which is as closely similar to the “Sermon on the Mount,” in some particulars, as it is widely unlike it in others.

This discourse is said to have been delivered in a “plain” or “level place” (Luke vi. 17), and by way of distinction we may call it the “Sermon on the Plain.”

I see no reason to doubt that the two Evangelists are dealing, to a considerable extent, with the same traditional material; and a comparison of the two “Sermons” suggests very strongly that “Luke’s” version is the earlier.  The correspondences between the two forbid the notion that they are independent.  They both begin with a series of blessings, some of which are almost verbally identical.  In the middle of each (Luke vi. 27-38, Matt. v. 43-48) there is a striking exposition of the ethical spirit of the command given in Leviticus xix. 18.  And each ends with a passage containing the declaration that a tree is to be known by its fruit, and the parable of the house built on the sand.  But while there are only 29 verses in the “Sermon on the Plain,” there are 107 in the “Sermon on the Mount”; the excess in length of the latter being chiefly due to the long interpolations, one of 30 verses before, and one of 34 verses after, the middlemost parallelism with Luke.  Under these circumstances it is quite impossible to admit that there is more probability that “Matthew’s” version of the Sermon is historically accurate, than there is that Luke’s version is so; and they cannot both be accurate.