2 Corinthians 10:2, 6, 8-9

but I beseech you, that I may not be bold when I am present with that confidence, wherewith I think to be bold against some, which think of us as if we walked according to the flesh.

and having in a readiness to revenge all disobedience, when your obedience is fulfilled.

For though I should boast somewhat more of our authority, which the Lord hath given us for edification, and not for your destruction, I should not be ashamed: that I may not seem as if I would terrify you by letters.