“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… Even in Patmos he made friends and converts. His was a message of joy, proclaiming a risen Saviour… God desires the old and tried laborers to stand in their place, doing their part to save men and women from being swept downward by the mighty current of evil. He desires them to keep the armor on till He bids them lay it down.”

Acts of the Apostles p.572-574
by Ellen G. White