Wonder -- is not precisely Knowing
And not precisely Knowing not --
My students and my children often live in this state between certainty and ignorance. Right now my three year old son knows that his nose is stuffy, but he doesn't understand why. He suspects that he'll get better, but he doesn't know when. He trusts that everything will be okay, but he doesn't know how.
Because he lives in this state of wonder, he is receptive to new ideas. In fact, he craves them. If you want to be a kid@heart, embrace wonder. :-)
