When is one "grown up"

When I was a child I believed that being a grown up was something that "happened" to you one day. I've been patiently waiting for that day ever since. I keep getting older, my debts get larger, my child becomes an adult and yet I feel no different. I still want everything, still make mistakes and still look to the day when I will finally know all the answers. I suppose knowing that we will never have it all or know it all is when we actually start to grow. Whether it's a starting place or an ending I suppose is up to each of us. I seem to have moments of pure clarity these days. Times when it all makes so much sense. It doesn't always last long but it's a promising sign. Perhaps I will grow into the number of which is attached to my life span. Maybe the next time someone asks how old I am I won't want to add "but I feel like I'm 22".