I read in the paper today that it is Henry David Thoreau's birthday. Here, from Walden is my favorite Thoreau quote:
I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived. . . I wanted to live deep and suck out all the marrow of life.