What is Henry David Thoreau’s most famous quote?

Among Henry David Thoreau’s most famous quotes is his statement in his book Walden (1854): “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.” The book describes Thoreau’s experiment in simple living in a cabin at Walden Pond in eastern Massachusetts. Another famous quote from Walden is “The mass of men lead lives of quiet desperation.”