释义：要了解过去和现在，以便灵活应变，适应变化。
Mathematics advances not by the efforts of individuals alone but through the collective work of generations.
最好的领导者是那些听比说更多的人。
Life is 10% what happens to you and 90% how you react to it.
Enjoyment appears at the boundary between boredom and anxiety, when the challenges are just balanced with the person’s capacity to act.
The only way to get rid of a temptation is to yield to it.