Identity is a funny thing, something we often take for granted. How do you define the you that you see in the mirror? Who is that person looking back at you and is it the same person who was there yesterday? What do you mean you have no reflection? Do your friends know you’re a vampire?
When you think back you might realise just how much you’ve changed over the years, even if you’re still relatively young. The fact that you (hopefully) no longer howl when hungry, or throw a temper tantrum at the supermarket ‘cos they’ve sold the last of your favourite ice cream or potato chips shows that you are evolving. Of course not in a Darwinian sense: you are unlikely to develop gills just because you swim a lot, or wings because you are tired of taking the bus. It doesn’t quite work like that, unfortunately.