This poem over all is very good, and simple and simple is good in this case.
You made a nice point with this, and I liked the way you set it up. I love to think like you did, you just never know, again you did well.
You used a simple technique, which helped you with this, if you would of tried to add more words to this, I think you would of changed the real meaning.
This poem caught my attention, and I know it will catch others, keep up the good work, you will get better the more you try.