Matthew 24  The disciples ask Jesus about His return to set up His kingdom on earth.  Jesus gives a detailed account of things that will happen prior to that time. We can easily list many of these things... wars, rumors of war, famines, earthquakes, etc.

What we don't think about quite as much are;
v5 - "for many will come in My name saying 'I am the Christ' and will mislead you."
v11 "and many false prophets will arise, and mislead many."
v23 " Then if anyone says to you, 'Behold, here is the Christ' or 'There He is' , do not believe him. For false Christ's and false prophets will arise and will show great signs and wonders, so as to mislead if possible, even the elect." 

This is not something that happens now overtly... although there are some crazy people that might claim to be Christ.  But, this will happen and Jesus warns us to be alert.  We must know the Word, especially the signs of His coming again.  It doesn't seem to matter whether we believe in pre-trib, post-trib, or whatever theological reasoning we subscribe to - the bottom line is that we ".. be on the alert for you do not know which day your Lord is coming." Because of this, Jesus tells us, we need to be living faithfully, enduring to the end, and ready for His appearance.

Three times in this discussion Jesus warns against being mislead.  False Christs and false prophets, false signs and wonders... false religions that take us away from the Truth of God's Word.. are something that we really need to be aware of.  It is so important that we know God's Word and that we keep growing in our knowledge of Him, so that we are not deceived.  There are churches.. so called Christian churches.. that are misleading people because they do not preach the whole Word of God.

Father, keep us in Your Hands, leading us in paths of righteousness for Your Name's sake.  Lead us not into temptation, nor into deceptive teachings, but deliver us from the evil one.  For Yours is the Kingdom, the Glory, and the Power!  In the Name of Jesus, the true Christ, we pray. amen.