To speak is to risk, but to be silent is to risk more.
说话是一种冒险，但沉默是更大的冒险。
The most important part of teaching is to teach what it is to know.
如果使人们喜怒无常，居处不定，思虑不得要领，行事中途就乱了章法；那么，天下间就会出现各种不平与不合理，而后像盗拓或者曾参、史鳅做的那些事情，都会发生。
And I hope you will come back here to Harvard 30 years from now and reflect on what you have done with your talent and your energy. I hope you will judge yourselves not on your professional accomplishments alone, but also on how well you have addressed the world's deepest inequities…on how well you treated people a world away who have nothing in common with you but their humanity.
我读一本无聊的书睡着了，梦见我继续读着，所以我因纯粹的厌倦而醒来。