Positive emotions are like nutrients for the mind, helping us grow and flourish.

The great cause of the prosperity of the country is liberty—liberty in the economic system.

朗费罗幽默的秘密源泉并不是欢乐而是悲伤。天堂里没有幽默。

处理一个不自由的世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反叛。