The growing hearts.

When you are old and wrinkly and possibly a little bit fat, will your heart have a size equivalent to your age?

By the time you are old and wrinkly and possibly a little bit fat, your heart will have shrunk with the passing of time. It will have seen so much, it will have grown so grumpy with the years, you will have develloped such character peculiarities, that you'll be old enough to never see the world through the eyes of the child you once were.

And that's so sad. Because your heart will be disproportionally small to your age, I am sure.