'One' in the Bible

We ought to give thanks to God always concerning you, brothers, just as it is fitting, because your faith is flourishing and the love of each one of you all toward one another is increasing

For the mystery of lawlessness is at work already; only the one who now restrains [will do so] until he is out of the way,

and then the lawless one will be revealed, whom the Lord Jesus will slay with the breath of his mouth, and wipe out by the appearance of his coming,

But the Lord is faithful, who will strengthen you and guard [you] from the evil one.