First they came for the Jews
  and I did not speak out
  because I was not a Jew.

  Then they came for the Communists
  and I did not speak out
  because I was not a Communist.

  Then they came for the trade unionists
  and I did not speak out
  because I was not a trade unionist.

  Then they came for me
  and there was no one left
  to speak out for me.

--Martin Niemöller