'Thing' in the Bible

And I wrote this very thing to you, so that when I came I would not have sadness from those who ought to make me rejoice, since I am confident in you all that my joy would be yours.

Therefore "come out from their midst, and be separate," says the Lord, "and touch no unclean thing, and I will welcome you,

For see what this very thing, this sadness as God intended, has produced in you: what eagerness, what defense of yourselves, what indignation, what alarm, what longing, what deep concern, what punishment! In everything you have proved yourselves to be innocent in this matter.

(To my disgrace I must say that we were too weak for that!) But whatever anyone else dares to boast about (I am speaking foolishly), I also dare to boast about the same thing.