2 Thessalonians 2:7

For the secret of evil is even now at work: but there is one who is keeping back the evil till he is taken out of the way.

Revelation 17:5

And on her brow was a name, SECRET, BABYLON THE GREAT, THE MOTHER OF THE EVIL WOMEN AND OF THE UNCLEAN THINGS OF THE EARTH.

Revelation 17:7

And the angel said to me, Why were you surprised? I will make clear to you the secret of the woman, and of the beast on which she is seated, which has the seven heads and the ten horns.

1 John 2:18

Little children, it is the last hour; and as you were given word that the Antichrist would come, so now a number of Antichrists have come to you; and by this we are certain that it is the last hour.

1 John 4:3

And every spirit which does not say this is not from God: this is the spirit of Antichrist, of which you have had word; and it is in the world even now.

Acts 20:29

I am conscious that after I am gone, evil wolves will come in among you, doing damage to the flock;

Colossians 2:18-23

Let no man take your reward from you by consciously making little of himself and giving worship to angels; having his thoughts fixed on the things which he has seen, being foolishly lifted up in his natural mind,

1 Timothy 3:16

And without argument, great is the secret of religion: He who was seen in the flesh, who was given God's approval in the spirit, was seen by the angels, of whom the good news was given among the nations, in whom the world had faith, who was taken up in glory.

2 Timothy 2:17-18

And their words will be like poisoned wounds in the flesh: such are Hymenaeus and Philetus;

Treasury of Scripture Knowledge

Summary

For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.

Bible References

The mystery

1 Timothy 3:16
And without argument, great is the secret of religion: He who was seen in the flesh, who was given God's approval in the spirit, was seen by the angels, of whom the good news was given among the nations, in whom the world had faith, who was taken up in glory.
Revelation 17:5
And on her brow was a name, SECRET, BABYLON THE GREAT, THE MOTHER OF THE EVIL WOMEN AND OF THE UNCLEAN THINGS OF THE EARTH.

Doth

Acts 20:29
I am conscious that after I am gone, evil wolves will come in among you, doing damage to the flock;
Colossians 2:18
Let no man take your reward from you by consciously making little of himself and giving worship to angels; having his thoughts fixed on the things which he has seen, being foolishly lifted up in his natural mind,
2 Timothy 2:17
And their words will be like poisoned wounds in the flesh: such are Hymenaeus and Philetus;
1 John 2:18
Little children, it is the last hour; and as you were given word that the Antichrist would come, so now a number of Antichrists have come to you; and by this we are certain that it is the last hour.
1 John 4:3
And every spirit which does not say this is not from God: this is the spirit of Antichrist, of which you have had word; and it is in the world even now.

He who

2 Thessalonians 2:6
And now it is clear to you what is keeping back his revelation till the time comes for him to be seen.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain