The document compares two sets of murals in San Francisco - the Coit Tower murals and murals in the Mission District. It finds the Coit Tower murals to be grim with crude artistry and didactic themes, while the Mission District murals depict overcoming adversity and are more affirmative and mythic in nature. The author prefers the positive and affirming nature of the Mission District murals over the Coit Tower murals.