The primary rules of obligation are those that require or forbid certain actions.

Sustainability is the cornerstone of modern farming. Without it, we risk losing everything we've built.

The way we see things is affected by what we know or what we believe.

If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.

我们不是在经营服务人的咖啡生意，而是在经营提供咖啡的人的事业。

The materials carry the message.

写作是一种政治行为，因为它揭露了隐藏的东西。