Science is the playground of the taxonomist.

The Worldly Hope men set their Hearts upon Turns Ashes—or it prospers; and anon, Like Snow upon the Desert's dusty Face, Lighting a little hour or two—is gone.

The healthy social life is found when in the mirror of each human soul the whole community finds its reflection, and when in the community the virtue of each one is living.

Life is short, and it’s up to you to make it sweet.

最优财政政策要求税收随时间平滑，因为突然的变化会扭曲经济决策。