生活中最好的东西是免费的。
The best things in life are free.
Rule of 3 in conversation. To get to the real reason， ask a person to go deeper than what they just said. Then again， and once more. The third time’s answer is close to the truth.
The best way to predict the future is to invent it.
The more you know, the more you realize you don't know.
翻译：强调保持平常心的重要性，以及理解地理气性对于认识器物本质的意义。
数学是为不同事物赋予相同名称的艺术。
"The only way to have a friend is to be one."