On learning and risk........

"One of the most quoted aphorisms in literature is Alexander Pope's: 'A little learning is a dangerous thing.'  T. H. Huxley pondered its implications.  'Where is the person,' he asked. 'who has enough of it to be out of danger?'
     "Learning, in this sense, is not without risk; there is always more to be learned.  But it is a glorious risk.  The only time the risk becomes fierce and unacceptable is when one seeks to avert it."

-Norman Cousins,  Human Options