数学的力量在于它的普遍性和抽象性。
The power of mathematics lies in its generality and abstraction.
When in doubt, tell the truth.
Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.
"El humor es una herramienta poderosa para hablar de las cosas serias."
The only sensible ends of literature are, first, the pleasurable toil of writing; second, the gratification of one's family and friends; and lastly, the solid cash.
翻译：君子说话要谨慎，饮食要节制。