If you care deeply about a cause and you are then engaged on behalf of that cause in an activity that makes you feel very good and very brave and you're really in solidarity with all your friends, and you're enjoying it, you're probably not advancing the cause very much, because you're spending all your time with people you agree with cheering each other on and not engaging.
Barney FrankThe most active people in the country know different things, and because each one tends to hear mostly and deal mostly with people with whom they agree, they are reinforced not simply in the conviction that they are right, which is totally appropriate, but that they are the majority. So you have both sides, the Left and the Right, thinking that the majority of the country is really with them.
Barney FrankTake free speech: most of the tough cases on free speech involve very unpleasant people saying very obnoxious things.
Barney Frank