世界上最好和最美丽的东西是看不见甚至摸不到的——它们必须用心去感受。
Don't watch the clock; do what it does. Keep going.
The iron rule of nature is: you get what you reward for. If you want ants to come, you put sugar on the floor.
最优财政政策要求税率随时间平稳变化,仅对政府支出的永久性变化作出反应。
最终,我们所拥有的只是我们告诉自己的故事。