Obi-Wan Kenobi: "I have something here for you. Your father wanted you to have this when you were old enough, but your uncle wouldn't allow it. He feared you might follow old Obi-Wan on some damn fool idealistic crusade like your father did."
Luke Skywalker: "What is it?"
Obi-Wan Kenobi: "Your father's light saber. This is the weapon of a Jedi Knight. Not as clumsy or random as a blaster, an elegant weapon for a more civilized age. For over a thousand generations, the Jedi Knights were the guardians of peace and justice in the Old Republic. Before the dark times... before the Empire."