An old Charlie Brown comic strip portrayed a scene with Lucy and Linus. Linus was watching the television when Lucy marched into the room, demanding to watch her show. Linus said, 'What makes you think you can walk in here and take over?' Lucy showed her fist to Linus, saying, 'These five fingers. Individually they're nothing but when I curl them together like this into a single unit, they form a weapon that is terrible to behold.' The last frame of the comic strip shows Linus looking at his fist, saying, 'Why can't you guys get organized like that?' The comic strip humorously portrays the truth that strength is found in unity. An old World War II slogan promoting unity said, 'United we stand; divided we fall.' Paul teaches about the unity of doctrine and practice in the opening verses of chapter four.