signs
In the parking garage at Columbia, someone wrote FATE IS WHAT YOU MAKE on the wall in blue ballpoint pen. The M in MAKE has an F over it in heavy black marker: FATE IS WHAT YOU FAKE. Which, I suppose, can be deep. If you think about it really hard.
Me, I prefer the more direct messages. Like, a couple of years ago I passed a hardware store on Kedzie which had bunches of neon signs in the window, the ones where each individual letter lights up. One of them said PAINT SOLD HERE. Except the T in PAINT was burnt out.