TIME IS RUNNING OUT?

After hibernating for almost a year, here i come today with a big bang, hooray!
Time flies, and mind u, u really feel it flying when u are in your 50's. When u are young, sayings like 'time and tide waits for no man', ' guangyin shi jian', 'yicun guangyin yicun jin' , etc ,etc, might sound silly to u; but now, i feel that these are so real. Peers are complaining that time is running out!
I remember when i was in my teen age, i admired those in their 20's, imagining myself like them one day, being independent and able to cycle to the cinema in the nearby town with friends. Naturally, i wished time could have passed faster then.
Then,.... coming to the 2nd half of my 20's, i tended to look at those in their 30's (even early 30's) as 'quite old'. I began to feel that time was passing fast...
So, the same feeling towards people elder than me went on when i reached my 30's and then 40's....And now, i looked at those in their 60's as 'old' people, 'thinking' that i am still young!
What when i reach my 60's? Only people in their 70's and 80's are old and i am still not old?
Hopefully i will never feel old even in my .........!