There’s a lot of research now that shows that in the teenage years we develop skills from what’s called autobiographical reasoning—which is the ability to derive personal meaning from your past—and that’s really the key to narrative identity. When you start doing that in your teenage years, then that kind of opens up a Pandora’s box that says “okay now you can actually create a story for your life that makes meaning about who you were and where you’re going. – Nautilus