The past is a source of knowledge, and the future is a source of hope. Love of the past implies faith in the future.
On choosing friends: "Life's too short to hang out with people who aren't resourceful."
生活中最好的东西是免费的。
礼义廉耻,可以用来要求自己,不可用来要求别人。要求自己则能少犯过失,要求别人则难以与人和睦相处,难以与他人相处就不合乎处世之道。所以君子只严格要求自己,小人则对别人求全责备。
合作是关键,伟大的科学从来不是孤立完成的。