Am I as old as I feel?

I had the epiphany today that for the first time in my life, I actually feel, mentally speaking, younger than I actually look and am in years. My mom used to say that I was born pushing 40. I guess now that I actually am, I want to turn back the clock.

I have always felt that I should be older-- that I was somehow mature beyond my years in terms of my serious nature and the incredibly (to the rest of the world) trivial intellectual pursuits constantly occupy my thoughts. I somehow thought that when I reached an age when I felt that I was as mature on the outside as I was on the inside that somehow people would take me more seriously and I would have arrived, so to speak. Well somehow I have missed that moment, and if I ever arrived, that train is pulling out of the station.