Either you will be healthy or sick.
If you are healthy, there is nothing to worry about.

But if you are sick, there are two things to worry about.
Either you will live or you will die.

If you live, there is nothing to worry about.
If you die there are only two things to worry about.

You will either go to heaven or to hell.
If you go to heaven, there will be nothing to worry about.

If you go to hell, you'll be so darn busy shaking hands with all your friends,
 you won't have time to worry!