LESSON #1 - SEVEN GREAT TRUTHS ABOUT MATTHEW 24 

Matthew 24:23-25: Jesus was speaking to His disciples:
“Then if anyone says to you, 'Look, here is the Christ!' or 'There!' do not believe it. 24 For false christs and false prophets will rise and show great signs and wonders to deceive, if possible, even the elect. 25 See, I have told you beforehand.”
Romans 8:33, 34: Who are the elect?
“Who shall bring a charge against God's elect? It is God who justifies. 34 Who is he who condemns? It is Christ who died, and furthermore is also risen, who is even at the right hand of God, who also makes intercession for us.”
Fact #3: We must study all three accounts together in order the get the complete picture
The Olivet Discourse is in Matthew 24, Mark 13 and Luke 21. In order to get the complete picture of end time events we must study all three together because each has its own particular details. Matthew describes earthquakes but Luke wrote about great earthquakes:
Matthew 24:7: Earthquakes
“For nation will rise against nation, and kingdom against kingdom. And there will
be famines, pestilences, and earthquakes in various places.”
Luke 21:11: Great earthquakes
“And there will be great earthquakes in various places, and famines and
pestilences; and there will be fearful sights and great signs from heaven.”
Matthew and Luke refer to pestilences, famines and earthquakes but Mark adds ‘troubles’ to the list of events at the ‘beginning of sorrows’:
Mark 13:8: Troubles: "disturbances/troubling of the waters”. The troubling of waters in the pool of Bethesda (John 5:4, 7). In the context of Mark, it means social turmoil and unrest.