Whoever is on the housetop must not go down to get the things out that are in his house. Whoever is in the field must not turn back to get his cloak. But woe to those who are pregnant and to those who are nursing babies in those days! But pray that your flight will not be in the winter, or on a Sabbath. For then there will be a great tribulation, such as has not occurred since the beginning of the world until now, nor ever will. Unless those days had been cut short, no life would have been saved; but for the sake of the elect those days will be cut short. Then if anyone says to you, ‘Behold, here is the Christ,’ or ‘There He is,’ do not believe him. For false Christs and false prophets will arise and will show great signs and wonders, so as to mislead, if possible, even the elect.
Mistaken and deceptive people claiming to be Jesus Christ. Jesus Christ warns his followers to be on their guard against the appearance of such people. Jesus Christ warns that false Christs will appear (Matthew 24:5; Mark 13:6; Luke 21:8; Matthew 24:23; Mark 13:21). False Christs will perform signs and miracles in order to deceive (Matthew 24:24; Mark 13:22).
False Christs can be recognized because the return of Jesus Christ will be obvious to everyone (Matthew 24:27-31; Mark 13:24-27; Luke 21:25-28). The personal return of the Lord Jesus Christ is not described in terms of an appearance to a select group, but to the whole world. The attempt of anyone to convince others that he is Christ therefore is a sure sign of deception.