Then they came for the Jews, and I didn't speak up because I wasn't a Jew. Then they came for the trade unionists, and I didn't speak up because I wasn't a trade unionist. Then they came for the Catholics, and I didn't speak up because I was a Protestant. We must always take sides. Neutrality helps the oppressor, never the victim.
Silence encourages the tormentor, never the tormented.
Each is generously peppered with quotes. This is the main PPR site. Covers much more than gardening.