2 Corinthians 10:2

But there are some in your midst who take a different view. This Paul, they say, is very emphatic and outspoken in his letters, but when he comes amongst you, Corinthians, he has less to say for himself. He does not recommend himself as a spiritual leader, a commissioned apostle of the Spirit. He is far less notable face to face than at a distance. Against those whose thoughts and words run on these lines I think that I have a good deal of confidence, my brethren, yes and courage and plain-spokenness, as I fear I may have to show unequivocally when I next visit you, and against these persons themselves.