If there is no struggle, there is no progress. Those who profess to favor freedom, and yet deprecate agitation, are men who want crops without plowing up the ground. They want rain without thunder and lightning. They want the ocean without the roar of its many waters. ...Power concedes nothing without a demand. It never did and it never will. ...Find out just what people will submit to, and you have found the exact amount of injustice and wrong which will be imposed upon them; and these will continue until they are resisted with either words or blows, or with both. The limits of tyrants are prescribed by the endurance of those whom they oppress.
Frederick Douglass
justice, oppression, power, progress, tyranny