The strength of a nation's institutions is not just in their formal rules, but in the informal norms that govern behavior and the degree to which they are internalized by the population.

解释：最上等的是树立德行，其次是建立功业，再次是创立学说，虽然逝去但业绩长存，这就叫做不朽。

力气单薄就不要去背负重物，说话没分量就不要规劝别人。

得不到渴望的某些东西是幸福不可或缺的一部分。

History is humanity's collective memory.

我不是一个沉溺于过去的人。