Without ecological balance, there is no real economic benefit.

时间最伟大的治愈者。

求知若飢，虚心若愚。

The next generation won't ask what we said—they'll ask what we did.

译文：借鉴前代兴衰，考察当下得失。《通鉴》的写作宗旨，直指现实关怀。

I am always glad to think that my education was, for the most part, informal, and had its roots in the soil.