Growing Up Is A Choice

As a kid, I would look at adults with awe because I believed that they had everything figured out. Now that I'm an adult I realize that not only do most people don't have everything figured out they're basically thinking the same way as they did when they were kids.

“Growing old is mandatory, but growing up is optional.” 

-Walt Disney (or Charles Theodore Davis)

While you'll never have everything figured out, you must live your life in such a way that if you were to look back 5 years ago you can see how much progress you've made since. Gray hair, by itself, isn't a good enough indicator of how "grown up" someone is.

How do I "grow up"?

You need to plan for it as it won't happen naturally. You need constantly challenge your philosophies for life, read and associate with people that are better than you so that some of their experiences can rub off on you.