Wan Kenobi referencing the Force, a form of energy connecting the galaxy, which some Force-sensitive individuals can tap into and enhance their abilities. Saying, "May the Force be with you," is akin to wishing someone "Good Luck.

"May the 4th be with you" is a play on words referencing "May the Force be with you," a common saying among Jedi and believers in the Force within Star Wars. The phrase was first spoken by General Jan Dodonna to his rebel pilots as they prepared to attack the Death Star in the 1977 film Star Wars: Episode IV - A New Hope.