可持续性不再是选择，而是这个行业生存的必要条件。

史记

Positive psychology is not a spectator sport.

The structure of the international system, not the intentions of individual states, is the primary determinant of state behavior.

Always be yourself, express yourself, have faith in yourself, do not go out and look for a successful personality and duplicate it.

【译文】请求人帮助就去求真正的男子汉，救济别人就救济那些急需救济的人。口渴的时候一滴水也如同甘露一般甜美，喝醉酒后再添杯还不如不添。