The main reason for the failure of the modern medical science is that it is dealing with results and not causes. Nothing more than the patching up of those attacked and the burying of those who are slain without a thought being given to the real strong hold.
Then there is a still higher type of courage - the courage to brave pain to live with it to never let others know of it and to still find joy in life to wake up in the morning with an enthusiasm for the day ahead.