2 Corinthians 10:8-10
10:8 For if I boast somewhat more about our authority that the Lord gave us for building you up and not for tearing you down, I will not be ashamed of doing so.
10:9 I do not want to seem as though I am trying to terrify you with my letters,
10:10 because some say, “His letters are weighty and forceful, but his physical presence is weak and his speech is of no account.”