"A young man without ambition is an old man waiting to be."
- Steven Brust

"We do not grow absolutely, chronologically. We grow sometimes in one dimension, and not in another; unevenly. We grow partially. We are relative. We are mature in one realm, childish in another. The past, present, and future mingle and pull us backward, forward, or fix us in the present. We are made up of layers, cells, constellations."
- Anais Nin

"I don't think people change. I think they definitely mature. But I think the essence of what I am today is the same as when I was five years old. It's just maturity. I've become a healthier, fuller expression of that essence."
- Ricky Williams

Benjamin Button lived his life in reverse and it was not as rosy as one would expect.....

Movie: The Curious Case Of Benjamin Button

Is the answer to be more knowledgeable and mature but have a youthful body (basically live your life in reverse)?

"Life would be infinitely happier if we could only be born at the age of 80 and gradually approach 18."
- Mark Twain

"Youth cannot know how age thinks and feels. But old men are guilty if they forget what it was to be young."
- J. K. Rowling, Harry Potter and the Order of the Phoenix

"[D]on't grow old. With age comes caution, which is another name for cowardice.... Whatever else you do in life, don't cultivate a conscience. Without a conscience a man may never be said to grow old. This is an age of very old men."
- Herbert Beerbohm Tree

"By the time we hit fifty, we have learned our hardest lessons. We have found out that only a few things are really important. We have learned to take life seriously, but never ourselves."
- Marie Dressler

"It is sad to grow old but nice to ripen."
- Brigitte Bardot

"At twenty years of age, the will reigns; at thirty, the wit; and at forty, the judgement."
- Benjamin Franklin

Wine and cheese - foods thought to be better with age.