II Corinthians 10:9-12

lest I seem to terrify you by letters. “For his letters,” they say, “are weighty and powerful, but his bodily presence is weak, and his speech contemptible.” Let such a person consider this, that what we are in word by letters when we are absent, such we will also be in deed when we are present. For we dare not class ourselves or compare ourselves with those who commend themselves. But they, measuring themselves by themselves, and comparing themselves among themselves, are not wise.