For we are glad, when we are weak... — The last words cover many shades of meaning. We may think of the weakness of his bodily presence, of his physical infirmities, of the apparent failure of his supernatural powers because the condition of the Corinthian Church, as walking in faith and truth, presented no opening for their exercise. He can find cause for joy in all these, if only the disciples whom he loves are strong with the strength of God.
This also we wish, even your perfection. — Better, your restoration. This is the only passage in the New Testament in which the word occurs; but the corresponding verb is found in the “mending their nets” of Matthew 4:21; Mark 1:19, and in the “restore” of Galatians 6:1. Its proper meaning is to bring back to completeness. This, then, was what the Apostle had been aiming at all along. In his seeming harshness and self-assertion, as in his overflowing tenderness, he was looking forward to their restoration to their first love and their first purity. He would rather threaten than act, even at the cost of the threat appearing an empty vaunt, if only he might be spared the necessity for acting.