能量守恒定律不仅仅是一个抽象原则；它是已被无数实验验证的自然法则。

To feed the world, we must first learn to listen to the earth.

You have to figure out what your own aptitudes are. If you play games where other people have the aptitudes and you don’t, you’re going to lose. And that’s as close to certain as any prediction that you can make. You have to figure out where you’ve got an edge. And you’ve got to play within your own circle of competence.

To be brave is to love someone unconditionally, without expecting anything in return.

The best ore deposits are found where others stopped looking.