2 Corinthians 10:9-12

I do not want you to think I am trying to scare you with my letters. Some people say, “Paul’s letters are powerful and sound important, but when he is with us, he is weak. And his speaking is nothing.” They should know this: We are not there with you now, so we say these things in letters. But when we are there with you, we will show the same authority that we show in our letters. We do not dare to compare ourselves with those who think they are very important. They use themselves to measure themselves, and they judge themselves by what they themselves are. This shows that they know nothing.