II Thessalonians 2:6,7,8
...you know what is restraining ...
For the mystery of lawlessness (that hidden principle of rebellion against JESUS ) is already at work in the world, [but it is] restrained only until He who restrains is taken out of the way.
And then the lawless one ( the antichrist / the son of perdition ) will be revealed...
note - The Restrainer is The Holy Spirit working in the true followers of JESUS -
After the rapture,
the son of perdition will rule with all the power of satan
or
[ 2 Thessalonians 2:11 - The antichrist demands worship from earthdwellers - says he is GOD ]
0r
[ 2 Thessalonians 2:9 thru 12 - the beast and his terrorist government ]
or