First they came for the Communists And I did not speak out Because I was not a Communist
Then they came for the Socialists And I did not speak out Because I was not a Socialist
Then they came for the trade unionists And I did not speak out Because I was not a trade unionist
Then they came for the Jews And I did not speak out Because I was not a Jew
Then they came for me And there was no one left To speak out for me
I never liked this quote, because it makes help a matter of anticipated reciprocal help rather than simply a good thing to do. Besides, memories are short.