It had become obvious that nonviolence could symbolize the gold badge of heroism rather than the white feather of cowardice. In addition to being consistent with his religious precepts, it served his need to act on his own for his own liberation. It enabled him to transmute hatred into constructive energy, to seek not only to free himself but to free his oppressor from his sins. This transformation, in turn, had the marvelous effect of changing the face of the enemy. The enemy the Negro faced became not the individual who had oppressed him but the evil system which permitted that individual to do so.
Martin Luther King Jr., Why We Can’t Wait, published 1964