3 since you are demanding proof that Christ is speaking through me. He is not weak toward you but is powerful among you.
3 Since ye seek a proof of ChristD8512 speaking in me, (who is not weak towards you, but is powerful among you,
Christ - I do not put 'the Christ' here, though there be the article, because it is specially connected with the speaking.
3 Since ye seek a proof of Christ speaking in me, which to you-ward is not weak, but is mighty in you.