Anakin Skywalker: You’re a Jedi knight, aren’t you?

Qui-Gon Jinn: What makes you think that?

Anakin Skywalker: I saw your laser sword. Only Jedis carry that kind of weapon.

Qui-Gon Jinn: Perhaps I killed a Jedi and took it from him.

Anakin Skywalker: I don’t think so. No one can kill a Jedi.

Qui-Gon Jinn: I wish that were so.

From Star Wars: Episode I – The Phantom Menace (1999)