Cross reference
2 Corinthians 7:16
16 It gives me great joy to see you answering to my good opinion of you in every way.
2 Corinthians 2:3
3 And I said this very thing in my letter, for fear that when I came I might have sorrow from those from whom it was right for me to have joy; being certain of this, that my joy is the joy of you all.
2 Thessalonians 3:4
4 And we have faith in the Lord about you, that you are doing and will do the things about which we give you orders.
Philemon 1:8
8 And so, though I might, in the name of Christ, give you orders to do what is right,
Philemon 1:21
21 Being certain that you will do my desire, I am writing to you, in the knowledge that you will do even more than I say.