Like childhood, old age is irresponsible, reckless, and foolhardy. Children and old people have everything to gain and nothing much to lose. It's middle-age which is cursed by the desperate need to cling to some finger-hold halfway up the mountain, to conform, not to cause trouble, to behave well.
He had never known such gallantry as the gallantry of Scarlett O'Hara going forth to conquer the world in her mother's velvet curtains and the tail feathers of a rooster.