The greatest tragedy is not death, but forgetting one's mother tongue.
We are all mosaics of genetic inheritance.
In mathematics, the art of proposing a question must be held of higher value than solving it.
历史学家既是侦探，也是讲故事的人。
真正的友情在困难时才会被考验。
The absence of a strong state is a greater threat to liberty than its presence.