As far as aging goes, I think we really only grow old when we fail to adapt. But then again, I am only in my thirties, so what do I know?
The eighteen months has been very transitional for me. At least I can say that I am content with the change. For all the bad that happened to me, I realize it was making way for the good. And as a result, the beauty of the good was all the more sweeter.
And brevity? My dear PIB, you flatter me! I have never been able to put things in a nutshell.
Don't worry about your age. I would bank on you any day of the week!
And honestly, I didn't realize how young/old you were until today.
You've a very square head on your shoulders, and I wish you the best.
When I said 'square head', I meant you were sensible. I hadn't heard the meaning you speak of from Google. I guess you learn something new everyday.
I once borrowed a book explaining the origin of English idioms. It was fascinating. Of course, with search engines, the answer is at your fingertips.