Cheerfulness keeps up a kind of daylight in the mind, and fills it with a steady and perpetual serenity.

Cheerfulness keeps up a kind of daylight in the mind, and fills it with a steady and perpetual serenity.

快乐使我们的心灵保持着一种光明，使它充满一种稳定和永恒的宁静。

-- Joseph Addison 约瑟夫·艾迪生