Courage, according to Churchill, is the ability to go from one defeat to another without losing enthusiasm.  And [Joyce] said that mistakes are the portals of discovery.
チャーチルに言わせると 「勇気とは 情熱を失わずに 負け続けられる能力」なのです  そしてジョイスによれば 「間違いは発見への入り口」です