"by our gathering together unto him" is the
Rapture, that is when Jesus comes for His
own.

Then Paul continues by telling us what will
destinguish the Day of the Lord. He says
"Unless the Rapture has happened, the Day
of the Lord is not present. Therefore, you
are not living in the Day of the Lord."

"Yea, and all that will live godly in Christ
Jesus shall suffer persecution,"
2 Timothy 3:12 Yes, there may be some
persecution in this Day of Grace.