I just read something that Orson Welles said that I think belongs here somehow or another:
"It's only in your twenties and in your seventies and eighties that you do the greatest work. The enemy of society is the middle class, and the enemy of life is middle age. Youth and old age are great times—and we must treasure old age and give genius the capacity to function in old age—and not send them away…."
Update: I should add that I don't believe what he says about the middle class. I think it is almost always wrong to make sweeping generalizations about huge numbers of people that you've never met. It's also Overt to look down on the middle class.