Personally, my expierence of being "Grown Up" has come from realizing that I don't react to things like I did when I was 16. I don't freak out about things, I'm much calmer emotionally, and I'm much much much more rational about things. My emotional state has sort of definied how "grown up" I'm acting in any given moment. I am so very happy to feel more grown up, more capable of handling a situation and feeling like I CAN handle it no matter what it is. Sure, I might get upset, but it's a different kind of upset than I got when I was younger. More "Damnit, I got a flat tire!" than "OMG FLAT TIRE WAAAAAA!"
But I still act like a total spaz sometimes. I work in childcare once a week, and I TOTALLY start acting like a twelve year old when I'm around little kids
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Sage knows our mythic history, King Arthur's and Sir Caradoc's
She answers hard acrostics, has a pretty taste for paradox
She quotes in elegiacs all the crimes of Heliogabalus
In conics she can floor peculiarities parabolous
-C'hi