램프를 만들어낸 것은 어둠이었고, 나침반을 만들어낸 것은 안개였고, 탐험을 하게 만든 것은 배고픔이었다.그리고 일의 진정한 가치를 깨닫기 위해서는 의기소침한 나날들이 필요했다.
Emergencies have always been necessary to progress. It was darkness which produced the lamp. It was fog that produced the compass. It was hunger that drove us to exploration. And it took a depression to teach us the real value of a job.