I'm at this age now where I'm not really considered "old," but I'm definitely not still considered "young."
I get carded at the liquor store sometimes, but I also go to bed before midnight every night. I've also started taking a multivitamin because, come on, you've got to take care of your body.
If you're also in the process of graduating into the next level of life (aka you're getting older, sis), then I think you're really going to relate to these quotes.