The concept of legal validity is crucial for understanding the nature of law.

The most radical thing you can do is to be absolutely contextual.

你必须愿意失败才能成功。

You can't cross the sea merely by standing and staring at the water.

与那些挑战你的人为伍，而不仅仅是那些赞同你的人。

如果你都不相信自己，没人会相信你。