这样确切的爱，一生只有一次。

技术可以放大优秀教学的效果，但无法替代糟糕的教学。

The things we admire in men, kindness and generosity, openness, honesty, understanding and feeling, are the concomitants of failure in our system. And those traits we detest, sharpness, greed, acquisitiveness, meanness, egotism and self-interest, are the traits of success.

——署名公告〈关于实行党纪的命令〉，提醒党员遵守党纪，1924年3月18日

"To live is to be followed by shadows."

Stay hungry, stay foolish.

出自北齐·颜之推《颜氏家训·勉学》。没有把天下所有的书读个遍，就不要信口雌黄的发表观点。