2 Thessalonians 2:4-7

who opposes and exalts himself [so proudly and so insolently] above every so-called god or object of worship, so that he [actually enters and] takes his seat in the temple of God, publicly proclaiming that he himself is God. [Ezek 28:2; Dan 11:36, 37] Do you not remember that when I was still with you, I was telling you these things? And you know what restrains him now [from being revealed]; it is so that he will be revealed at his own [appointed] time. For the mystery of lawlessness [rebellion against divine authority and the coming reign of lawlessness] is already at work; [but it is restrained] only until He who now restrains it is taken out of the way.