幸福需要三种常量营养素。它们是享受、满足和目的。真正对自己的生活感到幸福的人，他们同时具备这三个条件。他们拥有丰富的资源，而且拥有平衡的资源。享受、满足和目标失去平衡的人往往会认为自己不快乐。他们知道他们的幸福出了问题。 〜阿瑟·C·布鲁克斯

There are three macronutrients to happiness. They are enjoyment, satisfaction, and purpose. People who are truly happy about their lives, they have all three. And they have them in abundance, and they have them in balance. And people who are out of balance [with] enjoyment, satisfaction, and purpose tend to define themselves as unhappy. They know that something is wrong with their happiness. ~ Arthur C. Brooks