John Chrysostom
This occurrence is even more extraordinary than the earlier one, as it took place subsequently. After revealing His dominion over the sea, Christ performed another astonishing miracle in front of His disciples. Previously, He had merely commanded the winds; now He walks upon the waters and grants permission for another to do likewise. Had He commanded this from the outset, Peter would not have been willing to accept it with the right attitude, as his faith had not yet matured. So, what was the reason behind Christ allowing Peter to act? If Christ had told him, "You cannot," Peter, in his impulsiveness, would have likely argued against Him at that moment. Therefore, Christ encourages him through the very act to exercise greater caution moving forward. Yet, Peter remains undeterred by this.