Star Wars: The Clone Wars, Season 3

[Obi-Wan's vision]

Qui-Gon Jinn:
Obi-Wan, have you done as I asked? Have you trained the boy?

Obi-Wan Kenobi:
[shocked] Master Qui-Gon? How are you here?

Qui-Gon Jinn:
I am here because you are here.

Obi-Wan Kenobi:
No, I don’t understand. What is this place?

Qui-Gon Jinn:
Unlike any other, a conduit through which the entire Force of the universe flows.

Obi-Wan Kenobi:
Are we in danger?

Qui-Gon Jinn:
This planet is both an amplifier and a magnet. Three are here who seek Skywalker. They, like me, believe him to be the Chosen One.

Obi-Wan Kenobi:
You were right. The Force within him is stronger than any known Jedi. I have trained him as well as I could, but he is still willful, and balance eludes him.

Qui-Gon Jinn:
If he is the Chosen One, he will discover it here.

Obi-Wan Kenobi:
And if not?

Qui-Gon Jinn:
Then you must realize, with his power, this is a very dangerous place for him to be.