Darth Vader: I find your lack of faith disturbing.
[Princess Leia gets her first look at the Millenium Falcon.]
Princess Leia: You came in that thing? You're braver than I thought.
Han Solo: Hokey religions and ancient weapons are no match for a good blaster at your side, kid.
Ben Kenobi: Obi-Wan Kenobi? Obi-Wan. Now there's a name I've not heard in a long, long time. A long time.
Luke Skywalker: You do know him then?
Ben Kenobi: Of course I know him...he's me. I haven't gone by the name Obi-Wan since, oh, before you were born.
Luke Skywalker: I want to learn the ways of the force and become a Jedi, like my father.
Princess Leia: Help me, Obi-Wan Kenobi. You're my only hope.
Darth Vader: Your powers are weak, old man.
Obi-Wan: You can't win, Darth. If you strike me down, I shall become more powerful than you can possibly imagine.
Darth Vader: I have been waiting for you, Obi-Wan. We meet again at last. The circle is now complete. When I left you, I was a learner. Now I am the master.
Obi-Wan: Only a master of evil, Darth.
Princess Leia: Aren't you a little short for a stormtrooper?
Han Solo: That was luck.
Ben Kenobi: In my experience, there's no such thing as luck.
Luke: I have a very bad feeling about this.
Obi-Wan Kenobi: Who's more foolish, the fool or the fool who follows him?
Darth Vader: The Force is strong with this one.
Obi-Wan Kenobi: The Force will be with you. Always.
C-3PO: We seem to be made to suffer. It's our lot in life.
Luke Skywalker: Look, he's heading for that small moon.
Han Solo: I think I can get him before he gets there. He's almost in range.
Obi-Wan: That's no moon. It's a space station.
Answer: While planning Star Wars, Lucas had a vague notion of doing a long series of movies inspired by old serials, then dropped that idea in favor of just one. When Star Wars became a phenomenon and sequels became feasible, Lucas revisited the idea. He thought of three trilogies along with some stand-alone "in-between" stories for a total of 12 films. By the time of The Empire Strikes Back's release, this was pared down to the 9 mainline films, going by interviews with Lucas and the cast at the time. By Return of the Jedi, Lucas had decided to end the saga there, with the option that he could revisit the first three at some later point. It's unclear if Lucas ever had any specific story ideas for the proposed sequel trilogy, and they never had any scripts. Producer Gary Kurtz suggested in an interview they would've been about Luke's twin sister (not Leia), though many fans are skeptical about just how much he would know about them. Of course since this question was asked a sequel trilogy was written and released.
TonyPH