2 Thessalonians 2:1-3 "Concerning the Coming of Christ"

"Now, brethren, concerning the coming of our Lord Jesus Christ and our gathering together to Him, we ask you, ² not to be soon shaken in mind or troubled, either by spirit or by word or by letter, as if from us, as though the day of Christ had come. ³ Let no one deceive you by any means; for that Day will not come unless the falling away comes first, and the man of sin is revealed, the son of perdition,..."