One Bad Day

"All it takes is one bad day to reduce the sanest man alive to lunacy. That's how far the world is from where I am. Just one bad day. You had a bad day once, am I right? I know I am. I can tell. You had a bad day and everything changed. Why else would you dress up as a flying rat? You had a bad day, and it drove you as crazy as everybody else... Only you won't admit it! You have to keep pretending that life makes sense, that there's some point to all this struggling." — the Joker (Batman: the Killing Joke by Alan Moore and Brian Bolland)