释义：要了解过去和现在，以便灵活应变，适应变化。

The story of a poor man's life is written on his body, in a sharp pen.

I've always been a private person, but I understand that comes with the territory.

The best ideas come from listening, not just talking.

【大意】太阳不知道黑夜的情况，月亮不了解白昼的景象，太阳与月亮都有光亮可以照明，却不能兼知黑夜与白昼的情景。