Luke Skywalker comes into possession of some androids which carry secret plans to the Death Star, a moon-sized battle station equipped to destroy entire planets. The story ends with Luke discovering a power within himself called the Force, and using it to destroy the Death Star. He passes from a quirky, immature adolescent to a galactic hero fighting for the cause of justice, famous and honored among the Rebel Alliance and by all the oppressed people of the Empire. This plot has quite a few philosophical implications. Star Wars epitomizes the goals of mankind without God, the height of non-Christian achievement.
Strength comes from within.
One must discover and use this strength to do good and glorious things. These glorious things include striving for the good of mankind, fighting evil, and winning recognition, fame, and power. By so doing, though you will cease to exist, you will live on to affect future generations. Your name will be held dear by the people of the future, and in their memory, you will become immortal. These concepts are so strong in the movie that even as an second grader, I grasped them.