You may still want to ask why the Apostle said: We do not know what it is right to pray for, because, surely, we cannot believe that either he or those to whom he wrote did not know the Lord’s Prayer. He showed that he himself shared this uncertainty. Did he know what it was right to pray for when he was given a thorn in the flesh, an angel of Satan to bruise him, so that he might not be puffed up by the greatness of what was revealed to him? Three times he asked the Lord to take it away from him, which showed that he did not know what he should ask for in prayer. At last, he heard the Lord’s answer, explaining why the prayer of so great a man was not granted, and why it was not expedient for it to be granted: My grace is sufficient for you, for power shines forth more perfectly in weakness.