You cannot be the good one.

That's the most powerful thing I have heard since I first understood the reality of Capital. It's a deep realization of what privilege actually means and of your responsibility/duty/goal as a leftist. I really cannot do justice to it - you have to hear it from the source.

EDIT: It takes a while to get to the point. The first few minutes aren't that important. If you want, you can skip ahead to 5:20 where the critique actually begins.