58:15 The history of John affords a striking illustration of the way in which God can use aged workers. When John was exiled to the Isle of Patmos, there were many who thought him to be past service, an old and broken reed, ready to fall at any time. But the Lord saw fit to use him still. Though banished from the scenes of his former labor, he did not cease to bear witness to the truth. Even in Patmos he made friends and converts. His was a message of joy, proclaiming a risen Saviour who on high was interceding for His people until He should return to take them to Himself. And it was after John had grown old in the service of his Lord that he received more communications from heaven than he had received during all the former years of his life.