Why is it so much easier to comment on other people's blogs, rather than posting to our own?
I think it comes down to this: It's much easier to come up with great answers than it is to ask great questions.
Good blog posts implicitly or explicitly ask the reader good questions. They make us think and feel.
In fact, I think you can easily generalize and say that the key to wisdom is asking good questions.
And if that's the case, here's a question for you:
Why does our educational system focus on teaching us how to give good answers, rather than how to ask good questions? Can a multiple-choice test ever help you develop wisdom? And if not, why do we make kids take the SAT?
(Thanks to Penelope Trunk for triggering this thought)