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Compliment people behind their back. It’ll come back to you.

解釋：天地沒有完美的功效，圣人沒有完備的能力，萬物沒有完備的用途。

The Worldly Hope men set their Hearts upon Turns Ashes—or it prospers; and anon, Like Snow upon the Desert's dusty Face, Lighting a little hour or two—is gone.

降低成本的最好方法是一開始就沒有成本。