Since ye seek a proof of Christ speaking in me, which to you-ward is not weak, but is mighty in you. Since ye seek a proof of Christ - The conversion of the Corinthians was to themselves a solid proof that Christ spoke by the apostle; and therefore he could, with great propriety, say that this power of Christ, far from being weak, was mighty among them.
Related Commentaries of 2 Corinthians 13:3
2 Corinthians 13:3
3 Since ye seek a proof of Christ speaking in me, which to you-ward is not weak, but is mighty in you.