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.

마지막 구절이 인상적이죠.
죽음에 이르렀을때 내가 살아있지 않았었다는 것을 발견하지 않기 위해..