What does it mean?

Jesus did not say many would come claiming THEY are Christ.  He said what we actually SEE with our very eyes and HEAR with our very ears that many will say HE is Christ (for later).  Is it so hard to understand?  It is true Christ is Christ but who/what do people REALLY obey?  So in reality saying "Jesus is Christ" is lying.  Because who does not recognize that other things hold sway? So from Heaven's point of view Jesus is Christ but from Earth's point of view He is not.  So to say he is is not true.

What the scripture means is many will say Jesus is Lord/Savior/Christ. But He is Christ only to those who will listen.