"You are surprised that the world is losing its grip, that the world is grown old? Think of a man: he is born, he grows up, he becomes old. Old age has its many complaints: coughing, shaking, failing eyesight, anxious, terribly tired. A man grows old; he is full of complaints. The world is old; it is full of pressing tribulations. . . . Do not hold on to the old man, the world; do not refuse to regain your youth in Christ, who says to you, 'The world is passing away, the world is losing its grip, the world is short of breath. Do not fear, your youth shall be renewed as an eagle.'"
Augustine, quoted in Peter Brown, Augustine of Hippo: A Biography, pages 297-298.