You have to be comfortable with being uncomfortable if you want to make progress in mathematics.

忧患使人生存发展，安逸享乐使人萎靡死亡。

聪明的投资是价值投资，获得的比你付出的更多。

The goal of diplomacy is to resolve disputes through cooperation and dialogue, and promote peace and stability in the international order.

I have often been asked how my plays come about. I cannot say. Nor can I ever sum up my plays, except to say that this is what happened. That is what they said. That is what they did.