理解程序的最好方法是尝试改变它。
The best way to understand a program is to try to change it.
It is not the young people that degenerate,they are not spoiled till those of mature age are already sunk into corruption.
Insight is the sudden comprehension of the relations among the parts of a problem.
在股市中，最重要的不是预测未来，而是理解现在。
要在科学上成功，你需要对真理有热情。
"The best way to predict the future is to invent it."
数学是给不同事物赋予相同名称的艺术。