I went to the woods because I wished 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.

我现在承担了一项严肃的任务，恐怕这个任务超出了任何人的能力范围。

当你怀疑自己能否飞翔的那一刻，你就永远失去了飞翔的能力。