历史不是过去。它是我们进化出来的组织我们对过去的无知的方法。
History is not the past. It is the method we have evolved of organizing our ignorance of the past.
The most effective development interventions are often the simplest ones.
阅读未见过的书，如结识好朋友，情意和洽；重读已看过的书，如老朋友相晤，叙旧联谊。