Efficiency is doing things right; effectiveness is doing the right things.

释义：不能因为暂时的得意就自夸能力出众；也不能因为暂时的失意就丧失自己的志向。

Simple, sincere people seldom speak much of their piety; it shows itself in acts rather than words, and has more influence than homilies or protestations.

可持续发展不是一种选择，而是现代经济中生存的必要条件。