“There's never been a true war that wasn't fought between two sets of people who were certain they were in the right. The really dangerous people believe they are doing whatever they are doing solely and only because it is without question the right thing to do. And that is what makes them dangerous.”

“There's a difference between people who do hurtful things because they're evil and people who do bad things because of their circumstances.”

“I do not believe that the solution to our problem is simply to elect the right people. The important thing is to establish a political climate of opinion which will make it politically profitable for the wrong people to do the right thing. Unless it is politically profitable for the wrong people to do the right thing, the right people will not do the right thing either, or it they try, they will shortly be out of office.”

“But more than that, if you ally yourself with people who are prepared to fight to make a difference, then your life will always be in danger. I don't think it's fair to ever blame the person who makes the stand. Because the Doctor's so old, because he's done this so many times before, he sometimes forgets how dangerous it is. But if he didn't create the danger by opposing evil, if he didn't get these people to help him, then terrible things would happen. Standing up for what's right is always the best thing to do.”

“People were always sorry. Sorry they had done what they had done, sorry they were doing what they were doing, sorry they were going to do what they were going to do; but they still did whatever it is. The sorrow never stopped them; it just made them feel better. And so the sorrow never stopped.”

“What do such machines really do? They increase the number of things we can do without thinking. Things we do without thinking-there’s the real danger.”