This is the third time I am coming to visit you. As the Scriptures say, "The facts of every case must be established by the testimony of two or three witnesses."
References for 2 Corinthians 13:1
I have already warned those who had been sinning when I was there on my second visit. Now I again warn them and all others, just as I did before, that this next time I will not spare them.
I will give you all the proof you want that Christ speaks through me. Christ is not weak in his dealings with you; he is a mighty power among you.