First they came for the Communists but I was not a Communist...

First they came for the Communists but I was not a Communist so I did not speak out. Then they came for the Socialists and the Trade Unionists but I was not one of them, so I did not speak out. Then they came for the Jews but I was not Jewish so I did not speak out. And when they came for me, there was no one left to speak out for me.