The line comes from Yoda's training of Luke Skywalker on Dagobah in Star Wars: The Empire Strikes Back from 1980. When Luke doubts his ability to lift his X-wing, Yoda tells him that size matters not, teaching that strength comes from the Force rather than physical bulk. The scene became one of the saga's most quoted lessons, and the short audio has lived on across motivational edits, gym videos and meme compilations. Its staying power comes from the universal underdog message packed into Yoda's unmistakable speech pattern.