A number named "zero"

This was copied from my FB status today:

One day, there's a number named zero. He feels unloved and excluded. He thinks that everybody despises him because they always count from one, not from him. They only notice his existence when there's nothing. But there are some reasons why mathematicians invented him. Without him, people cannot define nothingness, develop decimal number system, invent set theory, and build a machine named computer. So, the moral of the story is that you have to be grateful for everything you have, for you have never been nothing, and you are loved! :)