lest I seem to terrify you by letters.
2 Corinthians 10:9
Surrounding context
10:8 For even if I should boast somewhat more about our authority, which the Lord gave us for edification and not for your destruction, I shall not be ashamed--
10:9 lest I seem to terrify you by letters.
10:10 "For his letters," they say, "are weighty and powerful, but his bodily presence is weak, and his speech contemptible."