The Son of Lawlessness

The "man of sin" or "man of lawlessness" or "lawless one", is also known as the "son of perdition (hell)" or "son of destruction".

What do we know about him?

He is revealed after "the falling away"

He opposes all that is called God or worshiped

He exalts himself above all that is called God or worshiped

He will sit as God in the temple of God (he places himself there)

He shows that he himself is God

He will be restrained until God releases him

He will be consumed with the breath of God's mouth

He will be destroyed with brightness of the second coming

His arrival is in accordance with the works of Satan

With Satan he will show power, signs, and lying wonders

He will work fill with unrighteousness

He will be a deceiver among those who are not Christians

He is the antichrist, who denies that Jesus is the Christ, and who denies the Father and the Son

The spirit of the antichrist is already in the world; every spirit that does not confess that Jesus Christ has come in the flesh is not of God (this is the spirit of the Antichrist)

Many deceivers have gone out into the world who do not confess Jesus Christ as coming in the flesh. This is a deceiver and an antichrist.

What else from other Scripture?

Many false christs and false prophets will arise, with great signs and wonders. Don't believe them! They will deceive even some of the elect.

In the latter times some will fall away from the faith and teach doctrines and rules that might seem okay but are false

They will have a form of godliness, but in unrighteousness will lead people away from God

People will fall away from the truth because they want to have the ears tickled, i.e. they will follow what those who say what they want to hear, but not the truth (what is it you want to hear? that certain sin is okay?)

When the false prophets come, they will even deny Christ

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2 Thessalonians 2:1-2 — Now we request you, brethren, with regard to the coming of our Lord Jesus Christ and our gathering together to Him,
that you not be quickly shaken from your composure or be disturbed either by a spirit or a message or a letter as if from us, to the effect that the day of the Lord has come.

2 Thessalonians 2:3-6 — Let no one in any way deceive you, for {it will not come} unless the (Or {falling away} from the faith) apostasy comes first, and the man of lawlessness is revealed, the son of destruction,
who opposes and exalts himself above every so-called god or object of worship, so that he takes his seat in the temple of God, displaying himself as being God.
Do you not remember that while I was still with you, I was telling you these things?
And you know what restrains him now, so that in his time he will be revealed.

2 Thessalonians 2:7-10 — For the mystery of lawlessness is already at work; only he who now restrains {will do so} until he is taken out of the way.
Then that lawless one will be revealed whom the Lord will slay with the breath of His mouth and bring to an end by the appearance of His coming;
{that is,} the one whose coming is in accord with the activity of Satan, with all power and signs and false wonders,
and with all the deception of wickedness for those who perish, because they did not receive the love of the truth so as to be saved.

1 John 2:22 — Who is the liar but the one who denies that Jesus is the Christ? This is the antichrist, the one who denies the Father and the Son.

1 John 4:3 — and every spirit that does not confess Jesus is not from God; this is the {spirit} of the antichrist, of which you have heard that it is coming, and now it is already in the world.

2 John 1:7 — For many deceivers have gone out into the world, those who do not acknowledge Jesus Christ {as} coming in the flesh. This is the deceiver and the antichrist.

Matthew 24:5 — ~"For many will come in My name, saying, `I am the Christ,' and will mislead many.

Matthew 24:11 — ~"Many false prophets will arise and will mislead many.

Matthew 24:24 — ~"For false Christs and false prophets will arise and will show great signs and wonders, so as to mislead, if possible, even the elect.

Mark 13:6 — ~"Many will come in My name, saying, `I am {He!'} and will mislead many.

Mark 13:21-22 — ~"And then if anyone says to you, `Behold, here is the Christ'; or, `Behold, {He is} there'; do not believe {him;}
for false Christs and false prophets will arise, and will show signs and wonders, in order to lead astray, if possible, the elect.

Acts 20:29-30 — ~"I know that after my departure savage wolves will come in among you, not sparing the flock;
and from among your own selves men will arise, speaking perverse things, to draw away the disciples after them.

1 Tim 4:1-3 — But the Spirit explicitly says that in later times some will fall away from the faith, paying attention to deceitful spirits and doctrines of demons,
by means of the hypocrisy of liars seared in their own conscience as with a branding iron,
{men} who forbid marriage {and advocate} abstaining from foods which God has created to be gratefully shared in by those who believe and know the truth.

2 Tim 3:1-6 — But realize this, that in the last days difficult times will come.
For men will be lovers of self, lovers of money, boastful, arrogant, revilers, disobedient to parents, ungrateful, unholy,
unloving, irreconcilable, malicious gossips, without self-control, brutal, haters of good,
treacherous, reckless, conceited, lovers of pleasure rather than lovers of God,
holding to a form of godliness, although they have denied its power; Avoid such men as these.

2 Tim 4:3-4 — For the time will come when they will not endure sound doctrine; but {wanting} to have their ears tickled, they will accumulate for themselves teachers in accordance to their own desires,
and will turn away their ears from the truth and will turn aside to myths.

2 Peter 2:1 — But false prophets also arose among the people, just as there will also be false teachers among you, who will secretly introduce destructive heresies, even denying the Master who bought them, bringing swift destruction upon themselves.