A painting must be beautiful in itself, not because it represents something beautiful.

Science should serve humanity, not the other way around.

Every decision we make today shapes the world we will live in tomorrow.

最重要的是尝试激励人们，让他们在自己想做的事情上变得伟大。

Money is not the key to happiness, but it helps.

The will to find meaning is the primary motivational force in man.

负责任的林业不是一种选择，而是我们所有人的义务。

快乐不是现成的东西。它来自你自己的行动。