At 30 you are still adolescent, at 40 a grown man; nowadays men of 50, 60 or even 70 are in early, high and late middle age. At 80 you start really aging, but 90? There is no real label: you are an antique.
Take that jump into the deep end of the pool and start paddling as fast as you can. You'll find that if you follow your heart's desires and you believe in yourself, it's never too late to live your dreams.
The 111th Congress, when it convenes on January 6th, will be the oldest in our nation's history. Each of the last five Congresses has, successively, set a new record as the oldest our country has ever seen.