I think that's one of the cleverest (or saddest) haiku I have ever heard!

Fortunately, this world is not the end.

Thanks. I strive to include both the puerile and the pithy in Haiku of the Day. My success varies.

As to there being another world; well, I'm glad that you believe that to be true, and I hope you're right. Not all of us do, though.