This chapter, and the two that follow it, are a sermon; a famous sermon; the sermon upon the mount. It is the longest and fullest continued discourse of our Saviour that we have upon record in all the gospels.

We have here a general account of this sermon. I. The Preacher was our Lord Jesus, the Prince of preachers, the great Prophet of his church, who came into the world, to be the Light of the world. The prophets and John had done virtuously in preaching, but Christ excelled them all.

Christ begins his sermon with blessings, for he came into the world to bless us , as the great High Priest of our profession; as the blessed Melchizedec; as He in whom all the families of the earth should be blessed, Gen. 12:3.

Christ had lately called his disciples, and told them that they should be fishers of men; here he tells them further what he designed them to be— the salt of the earth, and lights of the world, that they might be indeed what it was expected they should be. I. Ye are the salt of the earth.

Those to whom Christ preached, and for whose use he gave these instructions to his disciples, were such as in their religion had an eye, 1. To the scriptures of the Old Testament as their rule, and therein Christ here shows them they were in the right: 2.

Christ having laid down these principles, that Moses and the prophets were still to be their rulers, but that the scribes and Pharisees were to be no longer their rulers, proceeds to expound the law in some particular instances, and to vindicate it from the corrupt glosses which those expositors…

We have here an exposition of the seventh commandment, given us by the same hand that made the law, and therefore was fittest to be the interpreter of it: it is the law against uncleanness, which fitly follows upon the former; that laid a restraint upon sinful passions, this upon sinful appetites,…

We have here an exposition of the third commandment, which we are the more concerned right to understand, because it is particularly said, that God will not hold him guiltless, however he may hold himself, who breaks this commandment, by taking the name of the Lord in vain.

In these verses the law of retaliation is expounded, and in a manner repealed. Observe, I. What the Old-Testament permission was, in case of injury; and here the expression is only, Ye have heard that is has been said; not, as before, concerning the commands of the decalogue, that it has been said…

We have here, lastly, an exposition of that great fundamental law of the second table, Thou shalt love thy neighbour, which was the fulfilling of the law. I. See here how this law was corrupted by the comments of the Jewish teachers, Matt. 5:43.