@TH, I guess it all about how far confident about yourself is what it matters! those who live in doubt would feel too old no matter how young they are! and those who have self-confidence and truly believe in themselves are too young no matter old they are. This is how I see it personally.
Thank you for your comment, Long time didn't have a comment to discuss here.

Hmm, this is a very nice quote I had wanted to borrow it myself, but I got to thinking.
I would like to add my philosophical ideas. I believe it takes age and wisdom to become truly self confident.
I think most self confidence exhibited in young people is actually a certain degree of cockiness and not real
self confidence. The act is down but the knowledge and belief comes after time and experience. IMHO. :)