穷人并非不理性;他们和任何人一样理性,但他们在非常不同的约束下行动。
A rat in a maze is free to go anywhere, as long as it stays inside the maze.
最好的角色是那些在合上书后仍久久留在你心中的角色。
A good abstraction is one that emphasizes the essential and suppresses the irrelevant.