The greatest knowledge is to know oneself.
The future of global politics will be shaped by the competition between democratic and authoritarian systems.
过去不是静止的画卷，它随我们而动，随我们的变化而变化。
I have never been able to write a happy play. I can't. I can write a funny play, but not a happy play.
计算机科学的美在于其无限的可能性。
Leadership is about making others better as a result of your presence, and making sure that impact lasts in your absence.