Legal obligations are not merely moral obligations backed by sanctions.
最好的故事是那些同时触动心灵和思想的故事。
出自汉·桓宽《盐铁论·后刑》。锄去田里有害的杂草，禾苗就可以健康地生长；惩罚为非作歹的恶人，百姓就会感到喜悦。
The wisdom of hindsight, so useful to historians and indeed to authors of memoirs, is sadly denied to practising politicians.
The task of the writer is to confront the chaos of existence and to find some kind of order within it.
在没有航海图的海域上航行是需要勇气的。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。
Success is not final, failure is not fatal: It is the courage to continue that counts.