Ben Kenobi: Tell me, young Luke… what brings you out this far?
Luke Skywalker: This little droid. I think he’s searching for his former master… but I’ve never seen such devotion in a droid before. He claims to be the property… of an Obi-Wan Kenobi. Is he a relative of yours? Do you know who he’s talking about?
Ben Kenobi: Obi-Wan Kenobi? Obi-Wan. Now, that’s a name I’ve not heard in a long time. A long time.
Luke Skywalker: I think my uncle knows him. He said he was dead.
Ben Kenobi: Oh, he’s not dead. Not yet.
Luke Skywalker: You know him?
Ben Kenobi: Well, of course I know him. He’s me. I haven’t gone by the name of Obi-Wan… since, oh, before you were born.
From the movie Star Wars: Episode IV – A New Hope (1977)
“Of course I know him. He’s me.” – Quote meaning
Obi-Wan is the sass master, so there is no way he would answer Luke simply. While Luke thinks Obi-Wan Kenobi might be Ben Kenobi’s relative, the old master has a little fun on Luke’s expense. He does tell him but in a way longer dialogue than necessary and making it one of the film’s most iconic quote. The line “Well, of course I know him. He’s me.” not only became famous Star Wars quote but also sparked a lot of memes.
The Meme: “Well, of course I know him. He’s me.”
The image of Ben Kenobi uttering this line and pointing to himself became a fun way to react about things that can be said about one-selfs. Usually it is a way to anwer the question starting with “Do you know someone who…”