To sum up, we must learn to look at problems from all sides, seeing the reverse as well as the obverse side of things. In given conditions, a bad thing can lead to good results and a good thing to bad results. More than two thousand years ago Lao Tzu said: “Good fortune lieth within bad, bad fortune lurketh within good.”
总之，我们必须学会全面地看问题，不但要看到事物的正面，也要看到它的反面。在一定的条件下，坏的东西可以引出好的结果，好的东西也可以引出坏的结果。老子在二千多年以前就说过:“祸兮福所倚，福兮祸所伏。”
Original text (Chinese)