没有剑的契约只是空话，根本无法保护一个人。

We have to own our mistakes and learn from them.

Life imitates art far more than art imitates life.

The past is not a prison but a springboard.

It is easier to fight for one's principles than to live up to them.

You have to be willing to fail, to be wrong, to look stupid.

The Langlands correspondence is not just a theorem but a guiding principle for future discoveries.

儿童书籍应该充满温暖，而不仅仅是说教。