I went to the woods because I wanted to live deliberately,I wanted to live deep and suck out all the marrow of life, To put to rout all that was not life, and not when I had come to die, Discover that I had not lived.

Hope is not an emotion, but a choice.

I'm not a businessman, I'm a business, man.

生活对感受者来说是悲剧，对思考者来说是喜剧。

对心智的研究应着眼于其适应功能。