A Night in Jail
Thoreau refused to pay a tax to a slaveholding government and was jailed. His friend Emerson, the story goes, came to visit and asked, "Why are you in there?" Thoreau shot back, "Why are you not?" — under an unjust government, the place for an upright person is prison. That night in jail and that retort crystallized into Civil Disobedience, which later armed Gandhi and Martin Luther King.