"The past is a foreign country; they do things differently there."
数学的快乐来自创造的行为,而不仅仅是结果。
The past is a different country, they do things differently there.
译文:种植橘柚,吃起来是甜的,闻起来是香的;种植枳棘,长大了却会刺人。所以君子要谨慎地选择所要培养的人才。