First Thessalonians - Sanctification

1 Thessalonians 3:12-13 (English Standard Version)

and may the Lord make you increase and abound in love for one another and for all, as we do for you, 13 so that he may establish your hearts blameless in holiness before our God and Father, at the coming of our Lord Jesus with all his saints.

1 Thessalonians 4:16-18 (English Standard Version)

For the Lord himself will descend from heaven with a cry of command, with the voice of an archangel, and with the sound of the trumpet of God. And the dead in Christ will rise first. 17 Then we who are alive, who are left, will be caught up together with them in the clouds to meet the Lord in the air, and so we will always be with the Lord. 18 Therefore encourage one another with these words.