The world is passing away with its lusts, but he who does God's will remains forever.

 He goes on to say that the light is shining and the darkness is passing away. This must be read in context. By the time John wrote, at the end of the first century, men's ideas were changing. In the very early days they had looked for the Second Coming of Jesus as a sudden and shattering event within their own life time. When that did not happen, they did not abandon the hope but allowed experience to change it. To John the Second Coming of Christ is not one sudden, dramatic event but a process in which the darkness is steadily being defeated by the light; and the end of the process will be a world in which the darkness is totally defeated and the light triumphant. 