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Sometimes, the hardest thing in life is to know which bridge to cross and which to burn.

Life is a leaf of paper white，thereon each of us may write his word or two.

Trend-following is not such a good model. It’s simply eroded. Things change and being able to adjust is what made Mr. Simons so successful. “Statistic predictor signals erode over the next several years； it can be five years or 10 years. You have to keep coming up with new things because the market is against us. If you don’t keep getting better， you’re going to do worse.

世界上充滿了顯而易見卻無人注意的事物。