International Standard Version
1Now we ask you, brothers, regarding the coming of our Lord Jesus, the Messiah, and our gathering together to him, 2not to be so quickly upset or alarmed when someone claims that we said, either by some spirit, conversation, or letter that the Day of the Lord has already come. 3Do not let anyone deceive you in any way, for it will not come unless the rebellion takes place first and the man of sin, who is destined for destruction, is revealed. 4He opposes and exalts himself above every so-called god and object of worship. As a result, he seats himself in the sanctuary of God and himself declares that he is God. 5Don't you remember that I repeatedly told you about these things when I was still with you? 6You know what it is that is now holding him back, so that he will be revealed when his time comes. 7For the secret of this lawlessness is already at work, but only until the person now holding it back gets out of the way. 8Then the lawless one will be revealed, whom the Lord will destroy with the breath of his mouth, rendering him powerless by the manifestation of his coming. 9The coming of the lawless one will be accompanied by the power of Satan. He will use every kind of power, including miraculous signs, lying wonders, 10and every type of evil to deceive those who are dying, those who refused to love the truth that would save them. 11For this reason, God will send them a powerful delusion so that they will believe the lie. 12Then all who have not believed the truth but have taken pleasure in unrighteousness will be condemned.
13At all times we are obligated to thank God for you, brothers who are loved by the Lord, because God chose you to be the first fruits for salvation through sanctification by the Spirit and through faith in the truth. 14With this purpose in mind, he called you through our proclamation of the gospel so that you would obtain the glory of our Lord Jesus, the Messiah. 15So then, brothers, stand firm, and cling to the traditions that you were taught by us, either by word of mouth or by our letter.
16May our Lord Jesus, the Messiah himself, and may God our Father, who loved us and by his grace gave us eternal comfort and good hope, 17encourage your hearts and strengthen you in every good action and word.