Darkness cannot drive out darkness； only light can do that.Hate cannot drive out hate； only love can do that.

死者并非无力。我说过，死了吗？没有死亡，只有世界的变化。

The social responsibility of entrepreneurs is more important than making money.

Persistence is key in mathematical research; many great results come from looking at the same problem from different angles over and over again.

要依靠道德治理国家。这样就像北极星一样，虽然固定在一个地方不动，但群星却甘愿环绕在它周围。