I commend you for learning to use e-mail at your age! Not only could it keep you mentally alert, but it could also help you keep in touch with your grandchildren or others you can encourage. The Bible urges us to "encourage one another and build each other up" (1 Thessalonians 5:11).
Historians may well say that the invention of the computer marked a major turning point in the history of the human race. But could computers take control of our lives (as science fiction writers have speculated)? I doubt it -- because like any other tool, computers can only do what we tell them to do. Even evil men would be reluctant to develop such a machine, because it would mean they, too, would lose their freedom.
But I doubt it most of all because I know that God -- and not some evil human genius -- is in control of the future. The future is in God's hands -- and some day (the Bible says) Christ will come again to destroy all evil. God, the Bible says, "has set a day when he will judge the world with justice by the man he has appointed (Christ)" (Acts 17:31).
Is your hope and confidence in Christ -- not just for the future of the world, but for eternity? Some day, this life will be over -- but Jesus died to open heaven's door for us. Put your faith and trust in Him today.