想要变得富有，就去积攒所有那些金钱买不来的东西吧。

It seems to me that the natural world is the greatest source of excitement; the greatest source of visual beauty; the greatest source of intellectual interest. It is the greatest source of so much in life that makes life worth living.

农业的真正进步应以收成和生态系统健康双重标准衡量。