A reader’s favorite:
“A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.”
That sets the bar too low, in my opinion. I mean, he doesn’t even MENTION building tree houses.
(That particular reader, by the way, is a lady–she describes herself as “a Jill of all trades.” I am mildly surprised to find that Heinlein has a female fan. I thought this was quintesentially guy stuff. But hey, God bless you, Ma’am.)