Something to look forward to?

When you're young, you don't know, but you don't know you don't know, so you take some chances. In your twenties and thirties you don't know, and you know you don't know, and that tends to freeze you; less risk-taking. In your forties you know, but you don't know you know, so you may still be a bit tentative. But then, as you pass fifty, if you've been paying attention, you know, and you know you know. Time for some fun.

-- George Carlin, Brain Droppings