计算的本质不仅在于符号的操作，更在于对这些操作所代表意义的深刻理解。
The essence of computation is not just in the manipulation of symbols, but in the profound understanding of what those manipulations represent.
"A personality is a full Congress of orators and pressure-groups, of children, demagogues, communists, isolationists, war-mongers, mugwumps, grafters, prayer-meetings, spiritualists, and astrologers."
If economists could manage to get themselves thought of as humble， competent people on a level with dentists， that would be splendid.
天下都变成了秋天的气象，一个房间难以维持春天的温暖。
永远不要低估一个精心设计的实验的力量。