The city is the greatest invention of mankind.

中心地的等级越高，其数量越少，影响范围越大。

You are the artist of your own life.

The whole conviction of my life now rests upon the belief that loneliness, far from being a rare and curious phenomenon, peculiar to myself and to a few other solitary men, is the central and inevitable fact of human existence.

Love is the only force capable of transforming an enemy into a friend.

道德规则不是我们理性的结论。