And many false prophets will arise. This warning differs from the former, in which Christ foretold that many would come in his name. For there he spoke only of impostors, who, shortly after the commencement of the Gospel, gave out that they were the Christ; but now he threatens that in all ages false teachers will arise, to corrupt sound doctrine, as Peter tells us (2-Peter 2:1) that the Church will be no less exposed to this evil under the Gospel than it anciently was under the Law. There is therefore no reason why error, and certain impostures of the devil and corruptions of piety, should strike pious minds with dismay; since no man is properly founded on Christ, who has not learned that we must stand firm against such attacks; for this is the undoubted trial of our faith, when it is in no degree shaken by the false doctrines which arise, or does he only say that false prophets will come, but likewise that they will be so crafty as to deceive and draw away sects after them. [1] No ordinary caution is necessary here; for the multitude of those who are going astray is like a violent tempest, which compels us to leave the course, if we are not firmly fixed on God. On this subject something was said but lately.

Footnotes

1 - "En sorte qu'ils auront des disciples, et feront des sectes;" -- "so that they will have disciples, and will form sects."

And many false prophets - Many men pretending to be prophets or foretellers of future events. This refers not to the false "Messiahs" of which he had spoken Matthew 24:5, but to prophets who should appear during the siege of the city. Of them Josephus says: "The tyrannical zealots who ruled the city suborned "many false prophets" to declare that aid would be given to the people from heaven. This was done to prevent them from attempting to desert, and to inspire confidence in God." - "Jewish Wars," b. 6 chapter 5, section 2, 3.

False prophets - Also were to be raised up; such as Simon Magus and his followers; and the false apostles complained of by St. Paul, 2-Corinthians 11:13, who were deceitful workers, transforming themselves into the apostles of Christ. Such also were Hymeneus and Philetus, 2-Timothy 2:17, 2-Timothy 2:18.

And many false prophets shall rise,.... Out of, from among the churches of Christ; at least under the name of Christians; for false teachers are here meant, men of heretical principles, pretending to a spirit of prophecy, and to new revelations, and a better understanding of the Scriptures; such as Simon Magus, Ebion, and Cerinthus, who denied the proper deity, and real humanity of Christ; Carpocrates, and the Gnostics his followers, the Nicolaitans, Hymcneus, Philetus, and others:
and shall deceive many: as they all of them had their followers, and large numbers of them, whose faith was subverted by them; and who followed their pernicious ways, being imposed upon and seduced by their fair words, specious pretences, and licentious practices.

Many false prophets. False teachers. Compare Galatians 1:7; 1-John 2:12, 1-John 2:18; 1-John 4:1; 2-Peter 2:1; 1-Timothy 4:1. See also Josephus, Book VI. 5, sec. 3.