If there's a bright centre to this piece of news, you're on the planet that it's farthest from.
Luke: C'mon. Let's get out of here.
Obi-Wan: Hold on a moment.
Luke: Obi-Wan! Boy am I glad to see you! Why didn't you tell me any of this stuff about the Light Side?
Obi-Wan: I had no idea. None of us did.
Obi-Wan: We've had time for reflection here. In the swamp. Since you left.
Luke: Haven't the Jedi always been on the Light Side?
Obi-Wan: Never in my years of being a Jedi did anyone mention a Path to the Light Side. We just did what we thought was necessary.
Luke: Well that sounds fair enough.
Obi-Wan: Yet we failed. Catastrophically.
R2-D2: On the bright side, Luke's now the most powerful Jedi in the Galaxy.