Having authority - They felt a commanding power and authority in his word, i.e. his doctrine. His statements were perspicuous; his exhortations persuasive; his doctrine sound and rational; and his arguments irresistible. These they never felt in the trifling teachings of their most celebrated doctors, who consumed their own time, and that of their disciples and hearers, with frivolous cases of conscience, ridiculous distinctions, and puerile splittings of controversial hairs - questions not calculated to minister grace to the hearers.
Several excellent MSS. and almost all the ancient versions read, και οι Φαρισαιοι, and the Pharisees. He taught them as one having authority, like the most eminent and distinguished teacher, and not as the scribes and Pharisees, who had no part of that unction which he in its plenitude possessed. Thus ends a sermon the most strict, pure, holy, profound, and sublime, ever delivered to man; and yet so amazingly simple is the whole that almost a child may apprehend it! Lord! write all these thy sayings upon our hearts, we beseech thee! Amen.

For he taught them, as one having authority,.... This does not so much respect the subject matter of his ministry, the gravity, weight, and solidity of his doctrine; which, to be sure, was greatly different from that of the Scribes, which chiefly lay in proposing and handling things trivial, and of no moment; such as the rituals of the law, the traditions of the elders, or washing of the hands and cups, &c. nor merely the manner of his delivery, which was with great affection, ardour, and fervency of spirit, with much liberty and utterance of speech, and with wonderful perspicuity and majesty; in which also he differed from the Scribes, who taught in a cold and lifeless manner, without any spirit and power; but this chiefly regards the method he used in preaching, which was by delivering truths of himself in his own name, and by his own authority; often using those words, "but I say unto you": he spoke as a lawgiver, as one that had authority from heaven, and not from men;
and not as the Scribes, who used to say, when they delivered any thing to the people, "our Rabbins", or "our wise men say" so and so: such as were on the side of Hillell made use of his name; and those who were on the side of Shammai made use of his name; scarce ever would they venture to say anything of themselves, but said, the ancient doctors say thus and thus: almost innumerable instances might be given, out of the Talmud, in which one Rabbi speaks in the name of another; but our Lord spoke boldly, of himself, in his own name, and did not go about to support his doctrine by the testimony of the elders; but spake, as having received power and authority, as man, from his Father, "and not as the Scribes". Some copies add, and Pharisees; these generally going together; and so read the Vulgate Latin, the Syriac, the Persic versions, and the Hebrew edition of Matthew by Munster.

For he taught them as one having authority--The word "one," which our translators have here inserted, only weakens the statement.
and not as the scribes--The consciousness of divine authority, as Lawgiver, Expounder and Judge, so beamed through His teaching, that the scribes teaching could not but appear drivelling in such a light.

As having authority. He spoke, not as a man, with human doubts and limitations, but as one who was omniscient. He came from God, and spoke as one divine; not as a human, hesitating, halting, limping expounders like the scribes, the interpreters of the Scriptures.

He taught them - The multitudes, as one having authority - With a dignity and majesty peculiar to himself as the great Lawgiver, and with the demonstration and power of the Spirit: and not as the scribes - Who only expounded the law of another; and that in a lifeless, ineffectual manner.