There had been some people in the church who claimed that the rapture had already taken place and the believers had been left behind. Paul encouraged the people that this was not so and again taught them about the coming of the Lord. He then encouraged and prayed for them.

After the martyrs have been gloriously rewarded for their sacrifice, and the devil has been finally forever defeated, Christ will judge all the dead at the last judgment.
1) The Martyrs’ Great Reward
2) The Devil’s Final Doom
3) The Judge at the White Throne