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May the Force be with youThe Force is referenced several times throughout the Star Wars saga. In A New Hope, there are several mentions of the Force in reference to Luke Skywalker: by Obi-Wan Kenobi ("It surrounds us and penetrates us. It binds the galaxy together.", "Use the Force, Luke." and "The Force will be with you, always.") and Darth Vader ("The Force is strong with this one.") The famous line "May the Force be with you" is actually said by General Dodonna after explaining the Death Star attack plan to the Rebel pilots. It is said again by Han Solo to Luke, right before the attack on the Death Star battle station.
In The Empire Strikes Back, Emperor Palpatine states "There is a great disturbance in the Force," in reference to Luke Skywalker. Yoda points out that "a Jedi's strength flows from the Force." while training Luke (a statement he would repeat in Return of the Jedi); Yoda also explains that "you must feel the Force around you." During their battle in Cloud City, Darth Vader tells Luke "The Force is with you, young Skywalker, but you are not a Jedi yet." Finally, Luke says "May the Force be with you" at the end of the movie.
In Return of the Jedi, some references to the Force also include Yoda stating on his deathbed "Strong am I with the Force, but not that strong.", Luke revealing to Leia that he is her brother, by stating "The Force runs strong in my family", and Admiral Ackbar saying, "
May the Force be with us" immediately prior to the Battle of Endor.