“The Negro should not be deprived by unfair means of the franchise, but political agitation alone will not save him. Back of the ballot, he must have property, industry, skill, economy, intelligence and character. No race without these elements can permanently succeed. . . . We have a right to enter our complaints, but we shall make a fatal error if we yield to the temptation of believing that mere opposition to our wrongs will take the place of progressive, constructive action.” What does this quote mean?