The man of Sin, son of perdition must be revealed first before the Gathering together unto Christ (Rapture) 2 Thessalonians 2:1-4. The Antichrist comes first to exalt himself above God, to blaspheme God and to do signs and wonders to deceive people on earth, causing fire to fall from the sky. Then Jesus comes back in the clouds. The days will be shortened lest no flesh would be saved.