Since you seek a proof of Christ speaking in me, who toward you is not weak, but is mighty in you.
All Commentaries on 2 Corinthians 13:3 Go To 2 Corinthians 13
Cornelius a Lapide
Since ye seek a proof of Christ speaking in me. Do you mean to disregard my injunctions, in order to see whether I dare and have power to punish the disobedient by the power given me by Christ? So may a teacher say to his rebellious pupil, "Do you wish to feel the weight of my arm, and to try the birch?"
Which to you-ward is not weak. Christ has already shown Himself not weak but powerful, by powerfully working through me so many wonderful miracles, and by so recently punishing the fornicator by my excommunication, and handing him over to Satan as his tormentor. He refers principally to this power of punishing possessed by him.