释义：只有经过艰苦的努力和考验，才能发现或创造出价值重大的事物。
解释：所谓把粮食积存在取之不尽的粮仓里，就是要努力从事粮食生产。
"I have come to believe that a great teacher is a great artist and that there are as few as there are any other great artists. Teaching might even be the greatest of the arts since the medium is the human mind and spirit."