I remember being 18. I even remember being 15. I look back and I think, nope, I would NEVER return! I thought I knew then, but I didn’t. Now at 25, I know. I definitely know what I do know and absolutely not what I don’t.
Having just turned this age, I’m quietly satisfied with the things I know now. I have neatly collected these things into my brain and can even be trusted to act accordingly to this abundant knowledge at times convenient and not so.