21 Concerning the coming of our Lord Jesus Christ and our being gathered to him, we ask you, brothers and sisters, 2 not to become easily unsettled or alarmed by the teaching allegedly from us-whether by a prophecy or by word of mouth or by letter-asserting that the day of the Lord has already come.
3 Don't let anyone deceive you in any way, for that day will not come until the rebellion occurs and the man of lawlessness[1] is revealed, the man doomed to destruction. 4 He will oppose and will exalt himself over everything that is called God or is worshiped, so that he sets himself up in God's temple, proclaiming himself to be God. 5 Don't you remember that when I was with you I used to tell you these things? 6 And now you know what is holding him back, so that he may be revealed at the proper time. 7 For the secret power of lawlessness is already at work; but the one who now holds it back will continue to do so till he is taken out of the way. 8 And then the lawless one will be revealed, whom the Lord Jesus will overthrow with the breath of his mouth and destroy by the splendor of his coming. 9 The coming of the lawless one will be in accordance with how Satan works. He will use all sorts of displays of power through signs and wonders that serve the lie, 10 and all the ways that wickedness deceives those who are perishing. They perish because they refused to love the truth and so be saved. 11 For this reason God sends them a powerful delusion so that they will believe the lie 12 and so that all will be condemned who have not believed the truth but have delighted in wickedness.
13 But we ought always to thank God for you, brothers and sisters loved by the Lord, because God chose you as firstfruits[2] to be saved through the sanctifying work of the Spirit and through belief in the truth. 14 He called you to this through our gospel, that you might share in the glory of our Lord Jesus Christ. 15 So then, brothers and sisters, stand firm and hold fast to the teachings[3] we passed on to you, whether by word of mouth or by letter.
16 May our Lord Jesus Christ himself and God our Father, who loved us and by his grace gave us eternal encouragement and good hope, 17 encourage your hearts and strengthen you in every good deed and word.
21 Now, brothers, concerning the coming of our Lord Jesus Christ, and our gathering together to him, we ask you 2 not to be quickly shaken in your mind, nor yet be troubled, either by spirit, or by word, or by letter as from us, saying that the day of Christ had come.
3 Let no one deceive you in any way. For it will not be, unless the departure comes first, and the man of sin is revealed, the son of destruction, 4 he who opposes and exalts himself against all that is called God or that is worshiped; so that he sits as God in the temple of God, setting himself up as God. 5 Don’t you remember that, when I was still with you, I told you these things? 6 Now you know what is restraining him, to the end that he may be revealed in his own season. 7 For the mystery of lawlessness already works. Only there is one who restrains now, until he is taken out of the way. 8 Then the lawless one will be revealed, whom the Lord will kill with the breath of his mouth, and destroy by the manifestation of his coming; 9 even he whose coming is according to the working of Satan with all power and signs and lying wonders, 10 and with all deception of wickedness for those who are being lost, because they didn’t receive the love of the truth, that they might be saved. 11 Because of this, God sends them a working of error, that they should believe a lie; 12 that they all might be judged who didn’t believe the truth, but had pleasure in unrighteousness.
13 But we are bound to always give thanks to God for you, brothers loved by the Lord, because God chose you from the beginning for salvation through sanctification of the Spirit and belief in the truth; 14 to which he called you through our Good News, for the obtaining of the glory of our Lord Jesus Christ. 15 So then, brothers, stand firm, and hold the traditions which you were taught by us, whether by word, or by letter.
16 Now our Lord Jesus Christ himself, and God our Father, who loved us and gave us eternal comfort and good hope through grace, 17 comfort your hearts and establish you in every good work and word.
21 Now, friends, read these next words carefully. Slow down and don't go jumping to conclusions regarding the day when our Master, Jesus Christ, will come back and we assemble to welcome him. 2 Don't let anyone shake you up or get you excited over some breathless report or rumored letter from me that the day of the Master's arrival has come and gone.
3 Don't fall for any line like that. 4 He'll defy and then take over every so-called god or altar. Having cleared away the opposition, he'll then set himself up in God's Temple as "God Almighty." 5 Don't you remember me going over all this in detail when I was with you? Are your memories that short? 6 You'll also remember that I told you the Anarchist is being held back until just the right time. 7 That doesn't mean that the spirit of anarchy is not now at work. It is, secretly and underground. 8 But the time will come when the Anarchist will no longer be held back, but will be let loose. But don't worry. The Master Jesus will be right on his heels and blow him away. The Master appears and - puff! - the Anarchist is out of there. 9 The Anarchist's coming is all Satan's work. All his power and signs and miracles are fake, 10 evil sleight of hand that plays to the gallery of those who hate the truth that could save them. 11 And since they're so obsessed with evil, God rubs their noses in it - gives them what they want. 12 Since they refuse to trust truth, they're banished to their chosen world of lies and illusions.
13 Meanwhile, we've got our hands full continually thanking God for you, our good friends - so loved by God! God picked you out as his from the very start. Think of it: included in God's original plan of salvation by the bond of faith in the living truth. 14 This is the life of the Spirit he invited you to through the Message we delivered, in which you get in on the glory of our Master, Jesus Christ. 15 So, friends, take a firm stand, feet on the ground and head high. Keep a tight grip on what you were taught, whether in personal conversation or by our letter.
16 May Jesus himself and God our Father, who reached out in love and surprised you with gifts of unending help and confidence, 17 put a fresh heart in you, invigorate your work, enliven your speech.