[...] "And you are an alarmist. You are saying that this must lead to this, and you can’t prove it. These are the beginnings, yes; but how do you know for sure when you don’t know the end, and how do you know, or even surmise, the end? On the one hand, your enemies, the law, the regime, the Party, intimidate you. On the other, your colleagues pooh-pooh you as pessimistic or even neurotic. You are left with your close friends, who are, naturally, people who have always thought as you have.

"But your friends are fewer now. Some have drifted off somewhere or submerged themselves in their work. You no longer see as many as you did at meetings or gatherings. Informal groups become smaller; attendance drops off in little organizations, and the organizations themselves wither. Now, in small gatherings of your oldest friends, you feel that you are talking to yourselves, that you are isolated from the reality of things. This weakens your confidence still further and serves as a further deterrent to—to what? It is clearer all the time that, if you are going to do anything, you must make an occasion to do it, and then you are obviously a troublemaker. So you wait, and you wait.

"But the one great shocking occasion, when tens or hundreds or thousands will join with you, never comes. That’s the difficulty. If the last and worst act of the whole regime had come immediately after the first and smallest, thousands, yes, millions would have been sufficiently shocked—if, let us say, the gassing of the Jews in ’43 had come immediately after the ‘German Firm’ stickers on the windows of non-Jewish shops in ’33. But of course this isn’t the way it happens. In between come all the hundreds of little steps, some of them imperceptible, each of them preparing you not to be shocked by the next. Step C is not so much worse than Step B, and, if you did not make a stand at Step B, why should you at Step C? And so on to Step D.

"And one day, too late, your principles, if you were ever sensible of them, all rush in upon you. The burden of self-deception has grown too heavy, and some minor incident, in my case my little boy, hardly more than a baby, saying ‘Jewish swine,’ collapses it all at once, and you see that everything, everything, has changed and changed completely under your nose. [...]

Excerpt from the book They Thought They Were Free: The Germans, 1933-45 by Milton Mayer. Longer excerpt available here.