When you read,don't just consider what the author thinks,consider what you think.

It’s not supposed to be easy. Anyone who finds it easy is stupid.

Diplomacy is a means to achieve national interests, but it should also respect the principles of peace, justice, and rule of law.

The truth about a person is often found in what they tried to hide.

数学不仅仅是一种工具；它是一种思维方式。