"The world is always going to be dangerous, and people are always going to be good and bad."

When you have to kill a man it costs nothing to be polite.

The most glorious moments in your life are not the so-called days of success, but rather those days when out of dejection and despair you feel rise in you a challenge to life, and the promise of future accomplishment.

永远不要停止质疑如何改进事物。