The hardest thing in life is to know which bridge to cross and which to burn.

When stocks are attractive, you buy them. Sure, they can go lower. I've bought stocks at $12 that went to $2, but then they later went to $30. You just don't know when you can catch the bottom.

我们不必如此努力。

译文：心头治病必须要用治疗心病的药物，解开铃铛还是需要系铃铛的人。赏析：遇到任何问题，我们要探究根本原因，才能对症下药，收到事半功倍的效果。病急乱投医，只看表面现象，不去深究深层原因，做事只会功亏一篑。