St. Luke's report of the discourse of our Lord commonly termed the sermon on the mount. We consider that the discourse contained in the following thirty verses (20-49) is identical with that longer "sermon on the mount" reported by St. Matthew (5.). Certain differences are alleged to exist in the framework of the two discourses.
In St. Matthew the Lord is stated to have spoken it on the mountain; in St. Luke, in the plain. This apparent discrepancy has been already discussed (see above, on verse 17). The "plain" of St. Luke was, no doubt, simply a level spot on the hillside, on the fiat space between the two peaks of the hill.
The more important differences in the Master's utterances?봮f which, perhaps, one of the weightiest is the addition of St. Matthew to that first beatitude which explains what poor were blessed?봳he" poor in spirit "?봯robably arose from some questions put to the Master as he was teaching. In his reply he probably amplified or paraphrased the first utterance, which gave rise to the question; hence the occasional discrepancies in the two accounts. It is, too, most likely that many of the weightier utterances of the great sermon were several times reproduced in a longer or shorter form in the course of his teaching. Such repetitions would be likely to produce the differences we find in the two reports of the great sermon.
The plan or scheme of the two Gospels was not the same. St. Luke, doubtless, had before him, when he compiled his work, copious notes or memoranda of the famous discourse. He evidently selected such small portions of it as fell in with his design. The two discourses reported by SS. Matthew and Luke have besides many striking resemblances?봟oth beginning with the beatitudes, both concluding with the same simile or parable of the two buildings, both immediately succeeded by the same miracle, the healing of the centurion's servant. It is scarcely possible?봶hen these points are taken into consideration?봳o suppose that the reports are of two distinct discourses. The theory held by some scholars, that the great sermon was delivered twice on the same day, on the hillside to a smaller and more selected auditory, then on the plain below to the multitude in a shorter form, is in the highest degree improbable.
No portion of the public teaching of the Lord seems to have made so deep an impression as the mount-sermon. St. James, the so-called brother of Jesus, the first president of the Jerusalem Church, repeatedly quotes it in his Epistle. It was evidently the groundwork of his teaching in the first days. Barnabas, Clement of Rome, Ignatius, and Polycarp, the nameless author of the recently found 'Teaching of the Apostles,' whose writings represent to us most of the Christian literature which we possess of the first century after the death of St. Paul, quote it often. It may be taken, indeed, as the pattern discourse which mirrors better and mere fully than any other portion of the Gospels the Lord's teaching concerning the life he would have his followers lead.
It is not easy to give a precis of such a report as that of St. Luke, necessarily brief, and yet containing, we feel, many of the words, and even sentences, in the very form in which the Lord spoke them. What we possess here is, perhaps, little more itself than a summary of the great original discourse to which the disciples and the people listened. Godet has attempted, and not unsuccessfully, to give a resume of the contents of St. Luke's memoir here. Still, it must be felt that any such work must necessarily be unsatisfactory.
There appear to be three main divisions in the sermon: