"There will never be a computer program that can effectively respond to the command, "Tell me everything I need to know that is true, wise and relevant." When we search for that, we will always have to fall back on our own hard-won ability to make graceful use of ideas we inherit from those who needed no machines to think with, but only the resources of their own naked minds, a quiet place to gather their thoughts -- and perhaps a stick with which to scratch those thoughts in the sand."