You must take personal responsibility. You cannot change the circumstances, the seasons, or the wind, but you can change yourself. That is something you have charge of.
你必须承担个人责任。你无法改变环境、季节或风，但你可以改变自己。这是你可以掌控的事情。
The only valid data for psychology are the reports of trained observers.
The duty of a true patriot is to protect his country from its government.
数学的语言是普遍的，超越了文化和语言的障碍。
我们最大的弱点在于放弃。成功最可靠的方法就是再多尝试一次。