Answer:
The quote does not appear in the novel , but it does appear on the posters advertising the film version of The Outsiders from the flim on 1983. The lines appear above a photograph of the actors portraying the Greasers in the film, describing what some might believe to be the essence of Greaser identity: the need to belong.In both the film and the novel, the Greasers actually enjoy a sense of belonging when they are amongst themselves. Their outsider status is determined only by their position in comparison to the West Side Socs and the other members of the community who see Greasers as thugs.
Meaning:
This tagline is therefore poignant from an emotional point of view, it suggests that the Greasers want to be a part of the greater society that rejects them and misunderstands them.