And as Jannes and Jambres resisted Moses This comparison confirms what I have already said about the "last times", for he means that the same thing happens to us under the gospel, which the Church experienced almost from her very commencement, or at least since the law was published. In like manner the Psalmist also speaks largely about the unceasing battles of the Church. "Often did they fight against me from my youth, now let Israel say. The wicked ploughed upon my back, they made long their furrows." (Psalm 129:1,3) Paul reminds us, that we need not wonder if adversaries rise up against Christ to oppose his gospel, since Moses likewise had those who contended with him; for these examples drawn from a remote antiquity yield us strong consolation. It is generally believed; that the two who are mentioned, "Jannes and Jambres," were magicians put forward by Pharaoh. But from what source Paul learned their names is doubtful, except that it is probable, that many things relating to those histories were handed down, the memory of which God never permitted to perish. It is also possible that in Paul's time there were commentaries on the prophets that gave more fully those narratives which Moses touches very briefly. However that may be, it is not at random that he calls them by their names. The reason why there were two of them may be conjectured to have been this, that, because the Lord had raised up for his people two leaders, Moses and Aaron, Pharaoh determined to place against them the like number of magicians.

Now as Jannes and Jambres withstood Moses - The names of these two men are not elsewhere mentioned in the Bible. They are supposed to have been two of the magicians who resisted Moses (Exodus 7:11, et al.), and who opposed their miracles to those of Moses and Aaron. It is not certain where the apostle obtained their names; but they are frequently mentioned by the Hebrew writers, and also by other writers; so that there can be no reasonable doubt that their names were correctly handed down by tradition. Nothing is more probable than that the names of the more distinguished magicians who attempted to imitate the miracles of Moses, would be preserved by tradition; and though they are not mentioned by Moses himself, and the Jews have told many ridiculous stories respecting them, yet this should not lead us to doubt the truth of the tradition respecting their names. A full collection of the Jewish statements in regard to them may be found in Wetstein, in loc.
They are also mentioned by Pliny, Nat. Hist. 30:7; and by Numenius, the philosopher, as quoted by Eusebius, 9:8, and Origen, against Celsus, p. 199. See Wetstein. By the rabbinical writers, they are sometimes mentioned as Egyptian magicians who opposed Moses in Egypt, and sometimes as the sons of Balaam. The more common account is, that they were the princes of the Egyptian magicians. One of the Jewish rabbins represents them as having been convinced by the miracles of Moses, and as having become converts to the Hebrew religion. There is no reason to doubt that these were in fact the leading men who opposed Moses in Egypt, by attempting to work counter-miracles. The point of the remark of the apostle here, is, that they resisted Moses by attempting to imitate his miracles, thus neutralizing the evidence that he was sent from God. In like manner, the persons here referred to, opposed the progress of the gospel by setting up a similar claim to that of the apostles; by pretending to have as much authority as they had; and by thus neutralizing the claims of the true religion, and leading off weak-minded persons from the truth. This is often the most dangerous kind of opposition that is made to religion.
Men of corrupt minds; - compare the notes at 1-Timothy 6:5.
Reprobate concerning the faith - So far as the Christian faith is concerned. On the word rendered "reprobate," see the Romans 1:28 note; 1-Corinthians 9:27 note, rendered "cast-away;" 2-Corinthians 13:5 note. The margin here is, "of no judgment." The meaning is, that in respect to the Christian faith, or the doctrines of religion, their views could not be approved, and they were not to be regarded as true teachers of religion.

Now as Jannes and Jambres withstood Moses - This refers to the history of the Egyptian magicians, given in Exodus 7 (see on Exodus 7:11 (note) and Exodus 7:12 (note)), and particularly the concluding observations at the end of that chapter, (note) where several things are said concerning these two men.
Men of corrupt minds - It appears as if the apostle were referring still to some Judaizing teachers who were perverting the Church with their doctrines, and loudly calling in question the authority and doctrine of the apostle.
Reprobate concerning the faith - Αδοκιμοι· Undiscerning or untried; they are base metal, unstamped; and should not pass current, because not standard. This metaphor is frequent in the sacred writings.

Now as Jannes and Jambres withstood Moses,.... These were not Jews, who rose up and opposed Moses, as Dathan and Abiram did, as some have thought; but Egyptian magicians, the chief of those that Pharaoh sent for, when Moses and Aaron came before him, and wrought miracles; and who did in like manner by their enchantments, Exodus 7:11 upon which place the Targum of Jonathan has these words:
"and Pharaoh called the wise men and the magicians; and Janis and Jambres, the magicians of the Egyptians, did so by the enchantments of their divinations.''
And the same paraphrase on Exodus 1:15 calls them by the same names; and this shows from whence the apostle had these names, which are not mentioned in any place in the Old Testament; namely, from the traditions and records of the Jews, with which he was well acquainted: there is no need to say he had this account by divine revelation, for some of the Heathens had knowledge of this story some such way. Numenius; the philosopher, speaks of Jannes and Jambres as Egyptian scribes, and famous for their skill in the magic art; and who opposed themselves to Moses when the Jews were driven out of Egypt (l). Pliny also makes mention of Janme and Jotape as magicians; though he wrongly calls them Jews, and places Moses with them (m), as Jannes likewise is by Apuleius (n). It is commonly said by the Jews (o), that these were the two sons of Balaam, and they are said to be the chief of the magicians of Egypt (p); the latter of these is called in the Vulgate Latin version Mambres; and in some Jewish writers his name is Mamre (q) by whom also the former is called Jochane or John; and indeed Joannes, Jannes, and John, are the same name; and R. Gedaliah (r) says, that their names in other languages are John and Ambrose, which is not unlikely. Mention is made of the sons of Jambri in the Apocrypha:
"But the children of Jambri came out of Medaba, and took John, and all that he had, and went their way with it.'' (1 Maccabees 9:36)
whom Josephus (s) calls the sons of Amaraeus. These are said to be the persons that told Pharaoh, that a child should be born among the Israelites, by whom the whole land of Egypt should be destroyed, and which was the reason of Pharaoh's giving such a charge to the Hebrew midwives (t); also the making of the golden calf is ascribed to them (u); for, according to the Jews, they afterwards became proselytes; but these things are not to be depended on: however, certain it is, that they withstood Moses by their enchantments, and hardened Pharaoh's heart, so that, for a while, he would not let the children of Israel go. Now between these magicians, and the Papists before described, there is a very great agreement; as these men were Egyptians, so the Papists may be called, since Rome is spiritually called Sodom and Egypt, Revelation 11:8 as the one were, so the other are idolaters, who worshipped devils, idols of gold, silver, brass, stone, and wood, Revelation 9:20 and both sorcerers, using the magic art; Revelation 9:21 and they both pretended to miracles; though what they did were no other than lying wonders, 2-Thessalonians 2:9 and both agreed to keep the people of God in bondage, as much, and as long as they could: and particularly, as the magicians of Egypt withstood Moses,
so do these also resist the truth; the truth of one God, by their worshipping of images; and of one Mediator, by making use of angels, and saints departed, to intercede with God for them; and of justification by the righteousness of Christ, by introducing the doctrine of works, of merit, and supererogation; and of pardon and cleansing by the blood of Christ, and atonement by his sacrifice, by their pardons, indulgences, penance, purgatory, and the sacrifice of the Mass; yea, they resist the Scriptures of truth, not allowing them to be a sufficient rule without their unwritten traditions, and even Christ, who is truth itself, in all his offices, prophetic, priestly, and kingly.
Men of corrupt minds, of bad principles, holding antichristian tenets, derogatory to the grace of God, and glory of Christ; giving heed to seducing spirits, and doctrines of devils; like Jannes and Jambres, who were given to magic arts, and were under the influence of Satan:
reprobate concerning the faith; men of no judgment in the doctrine of faith; who have not their senses exercised to discern good and evil, to try things that differ, and approve the more excellent, but call good evil, and evil good: or as those who are disobedient and wicked in their lives, are said to be to every good work reprobate, Titus 1:16 so these are said to be reprobate to the faith; that is, to have no liking of it, or value for it, but despise it, hate it, and reject it; and upon that account, as they are like reprobate silver, whom God has rejected, they ought to be rejected by men.
(l) Apud Euseb. Praeparat. Evangel. l. 9. p. 411. (m) Nat. Hist. l. 30. c. 1. (n) Apolog. p. 248. (o) Targum Jonah. in Numb. xxii. 22. & Zohar in Numb. fol. 78. 3. & Chronicon Mosis, fol. 6. 2. (p) Targum Jonah. in Exod. i. 15. & vii. 11. & Zohar in Exod. fol. 75. 1. (q) T. Bab. Menachot, fol. 85. 1. Midrash Shemot Rabba, sect. 9. fol. 97. 3. & Aruch. in voce. (r) Shalsheleth Hakabala, fol. 7. 1. (s) Antiqu. l. 13. c. 1. sect. 2. (t) Targum Jonah. in Exod. i. 15. (u) Zohar in Exod. fol. 75. 1. & in Numb. fol. 78. 3. Shalsheleth, ib.

Now--Greek, "But"; it is no wonder there should be now such opponents to the truth, for their prototypes existed in ancient times [ALFORD].
Jannes . . . Jambres--traditional names of the Egyptian magicians who resisted Moses (Exodus 7:11, Exodus 7:22), derived from "the unwritten teaching of the Jews" [THEODORET]. In a point so immaterial as the names, where Scripture had not recorded them, Paul takes the names which general opinion had assigned the magicians. EUSEBIUS [Preparation of the Gospel], quotes from NUMENIUS, "Jannes and Jambres were sacred scribes (a lower order of priests in Egypt) skilled in magic." HILLER interprets "Jannes" from the Abyssinian language a trickster, and "Jambres" a juggler" (Acts 13:8).
resist--"withstand," as before. They did so by trying to rival Moses' miracles. So the false teachers shall exhibit lying wonders in the last days (Matthew 24:24; 2-Thessalonians 2:9; Revelation 13:14-15).
reprobate--incapable of testing the truth (Romans 1:28) [BENGEL]. ALFORD takes passively, "not abiding the test"; rejected on being tested (Jeremiah 6:30).

As Jannes and Jambres. These were the traditional names of the Egyptian magicians who opposed Moses. See Exodus 7:11. Paul adopts these names in referring to them. As these opposed Moses, so do the false teachers just described oppose the truth. These names are found in a Jewish Targum on Exodus 7:11, and Exodus 22:11.
Reprobate. Have abandoned the faith.
They shall proceed no further. They shall be exposed, and their folly revealed to prevent them from further success. As Jannes and Jambres could not stand before Moses, these men shall fail before the truth.

Several ancient writers speak of Jannes and Jambres, as the chief of the Egyptian magicians. Men of corrupt minds - Impure notions and wicked inclinations. Void of judgment - Quite ignorant, as well as careless, of true, spiritual religion.