In what is now referred to as the Olivet discourse, Jesus revealed signs of the end of the age in which non-Jewish believers would be integrated into the kingdom of God. As he began to focus on the Great Tribulation, Jesus warned his disciples that imposters would try to deceive the Jews into thinking their Messiah had arrived. He said, “And then if any man shall say to you, Lo, here is Christ; or lo, he is there; believe him not: for false Christs and false prophets shall rise, and shall shew signs and wonders to seduce, if it were possible even the elect. But take ye heed: behold, I have foretold you all things” (Mark 13:221-23). The Greek word translated seduce, apoplanao, which means “to lead astray” (G635), seems to suggest an evangelistic effort that is not based on the New Testament of the Bible. It could be that the Jews will one day realize they missed their opportunity to receive God’s salvation and will try to obtain salvation through some other means. Jesus’ comment “I have foretold you all things” was probably meant to be a type of line in the sand that marked the end of divine revelation. At the conclusion of his Olivet discourse, Jesus didn’t intend to say anything more about his return to Earth and didn’t want there to be any confusion about whether or not he had left anything out.
The primary reason Jesus warned his followers about imposters that would try to lead them astray was because of the Antichrist’s role in deterring the Jews from inheriting the kingdom of heaven. The term antichrist was introduced around the end of the first century by the Apostle John in his first general epistle to believers. John’s objective was to expose false teachers and give believers assurance of salvation. John said, “Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time” (1 John 2:18). John went on to say, “Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son” (1 John 1:22). John’s reference to the last time was probably not meant to suggest that Jesus’ return was imminent, but that the ministry that Jesus launched was coming to a conclusion. John was the last survivor of the original twelve apostles and was probably nearing the end of his life when he wrote his general epistles. One thing that is certain from John’s message was that before the end of his ministry, it had already become common knowledge that someone known as “antichrist” was going to try and take the place of Jesus as the savior of the world. The imposter will likely have a similar appearance to Jesus as being a compassionate leader, but will deny the authority of God and will try to usurp his power.