Luke 3:7

The Jews he calls "offspring of vipers," because they insulted their fathers and mothers; for this animal, they say, gnaws through the womb of its mother and is thus born. Moreover, they killed the prophets and teachers. By "the wrath to come" he means the …

He said therefore to the crowds etc. Here the preaching of John is commended for the severity of his zeal. And because piety ought to be joined to severity, therefore first a rebuke is set forth; second, an exhortation is added, at the words: Bring …

For because this statement aims at this—that He will be seen by all flesh at the final examination—it is rightly added: "He said therefore to the crowds that went out to be baptized by him: You offspring of vipers, who has shown you to flee from the wrath to come?" For the wrath to come is the punishment of final vengeance, which the sinner cannot then escape who does not now have recourse to the laments of penance. And it should be noted that evil offspring, imitating the actions of evil parents, are called offspring of vipers, because by envying the good and persecuting them, by returning evil to some, by seeking injuries against their neighbors—since in all these things they follow the ways of their carnal forebears—they are as if venomous children born from venomous parents.

(in Hom. 20, in Ev.) Because the Jews hated good men, and persecuted them, following the steps of their carnal parents, they are by birth the poisonous sons, as it were, of poisonous or sorcerous parents. But because the preceding verse declares that at the last judgment Christ shall be seen by all flesh, it is rightly added, Who hath warned you to flee from the wrath to come? The wrath to come being the awarding of final punishment.

He said therefore to the crowds coming out to be baptized by him: "Brood of vipers," etc. For the coming wrath is the judgment of final retribution. The sinner will not be able to escape this judgment who now does not turn to the laments …

In Matthew he is said to have preached these same things to many of the Pharisees and Sadducees, that came to his baptism ( Matt. iii. 7-10 ); but here he is said to have spoken them to the multitude, that came forth to be baptized of him,

Then said he to the multitude,....

This generation of vipers is fairly warned to flee from the wrath to come, which is certainly before them if they continue such; and their being a multitude will not be at all their security, for it will be neither reproach nor loss to God to cut them off. We are not only warned of this wrath, but are put into a way to escape it, if we look about us in time.

We have, in these verses, a specimen of John the Baptist's ministry. It is a portion of Scripture which should always be especially interesting to a Christian mind. The immense effect which John produced on the Jews, however temporary — is evident, from many expressions in the Gospels. The remarkable testimony which our Lord bore to John, as "a prophet greater than any born of woman," is well-known to all Bible readers. WHAT THEN WAS THE CHARACTER OF JOHN'S MINISTRY? This is the question to which the chapter before us supplies a practical answer.

We have, in these verses, a specimen of John the Baptist's ministry. It is a portion of Scripture which should always be especially interesting to a Christian mind. The immense effect which John produced on the Jews, however temporary — is evident, from many expressions in the Gospels. The remarkable testimony which our Lord bore to John, as "a prophet greater than any born of woman," is well-known to all Bible readers. WHAT THEN WAS THE CHARACTER OF JOHN'S MINISTRY? This is the question to which the chapter before us supplies a practical answer. We should first mark — the holy boldness with which John addresses the multitudes who came to his baptism. He speaks to them as a "brood of vipers!" He saw the rottenness and hypocrisy of the profession which the crowd around him were making, and uses language descriptive of their case. His head was not turned by popularity. He did not care who was offended by his words. The spiritual disease of those before him was desperate, and of long standing — and he knew that desperate diseases need strong remedies! Well would it be for the Church of Christ, if it possessed more plain speaking ministers in our days — like John the Baptist. A morbid dislike to strong language; an excessive fear of giving offence; a constant flinching from directness and plain speaking — are, unhappily, too much the characteristics of the modern Christian pulpit. Uncharitable language is no doubt always to be deprecated. But there is no charity . . . in flattering unconverted people, in abstaining from any mention of their vices, or in applying smooth names to damnable sins! There are two texts which are too much forgotten by Christian preachers. In one it is written, "Woe unto you when all men shall speak well of you." Luke 6:26. In the other it is written, "Am I now trying to win the approval of men — or of God?

On this account of the Baptist’s mode of preaching, see the notes on Mat 3:7-11 (note).