The price of freedom is eternal vigilance.

表达对人生无常的感悟，认为聚散悲欢皆有缘由

技术应该像电力一样在后台为你工作。

Science without religion is lame, religion without science is blind.

O amor é a única coisa que cresce quando se gasta.

What I remember above all about Harvard was being in the midst of so much energy and intelligence. It could be exhilarating, intimidating, sometimes even discouraging, but always challenging. It was an amazing privilege…and though I left early, I was transformed by my years at Harvard, the friendships I made, and the ideas I worked on.

预测未来的最好方法就是创造未来。

【讲解】：君子如果不自重，就没有威严，(别人也不会尊重你)，学习的知识就不会扎实。做人重要的是讲求忠诚，守信用。不要同不如自己的人交朋友。如果犯了错误，就不要害怕改正。