Filoni: "Qui-Gon hasn't given up on the fact that Jedi are supposed to actually care, and love, and that's not a bad thing. The rest of the Jedi are so detached and they've become so political, that they've really lost their way. And Yoda starts to see that in the second film. But Qui-Gon is ahead of them all."
Also sheds some light on the true meaning of "The Duel of the Fates", which is something I had never considered before.
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"I am tired of Earth. These people.
I am tired of being caught in the tangle of their lives."