The more you give, the more you get back.

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

【大意】等到大寒节气到来时，冰霜寒雪从天而降，然后才能知道只有松柏能经得住严寒考验，依然繁茂。

办事，不能做尽；说话，不能说尽；势力，不能倚尽；幸福，不能享尽。