The most important room in a house is the space between people.

The true value of a forest is measured not in board feet, but in biodiversity.

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.

"We need to think about AI not just as a technology, but as a societal challenge."