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 awful roar of its many waters. This struggle may be a moral one, or it may be a physical one, or it may be both moral and physical, but it must be a struggle. Power concedes nothing without a demand. It never did and it never will. —Frederick Douglass, My Bondage and My Freedom
(quoted in Racism without Racists by Eduardo Bonilla-Silva)
Brief comment – though Mr. Douglas was obviously writing of the pursuit of freedom, it is simply a true statement. Every step forward faces resistance, so struggle is always present.