Noam Chomsky:

If we don’t believe in freedom of expression for people we despise, we don’t believe in it at all.

Also:

The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum – even encourage the more critical and dissident views. That gives people the sense that there’s free thinking going on, while all the time the presuppositions of the system are being reinforced by the limits put on the range of the debate.

And:

The intellectual tradition is one of servility to power, and if I didn’t betray it I’d be ashamed of myself.

Food for thought.