'One' in the Bible

We are bound to always give thanks to God for you, brothers, even as it is appropriate, because your faith grows exceedingly, and the love of each and every one of you towards one another abounds;

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,

For the mystery of lawlessness already works. Only there is one who restrains now, until he is taken out of the way.

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;

But the Lord is faithful, who will establish you, and guard you from the evil one.