"All who are weary and heavy laden; all who suffer under injustice; all who suffer from the outrages of the existing bourgeois society; all who have in them the feeling of the worth of humanity, look to us, turn hopefully to us, as the only party that can bring rescue and deliverance. And if we, the opponents of this unjust world of violence, suddenly reach out the hand of brotherhood to it, conclude alliances with its representatives, invite our comrades to go hand in hand with the enemy whose misdeeds have driven the masses into our camp, what confusion must result in their minds! ... It must be that for the hundreds and thousands, for the millions that have sought salvation under our banner, it was all a colossal mistake for them to come to us. If we are not different from the others, then we are not the right ones – the Savior is yet to come; and the Social Democracy was a false Messiah, no better than the other false ones! Just in this fact lies our strength, that we are not like the others, and that we are not only not like the others, and that we are not simply different from the others, but that we are their deadly enemy, who have sworn to storm and demolish the Bastile of Capitalism, whose defenders all those others are. Therefore we are only strong when we are alone. This is not to say that we are to individualise or to isolate ourselves. We have never lacked for company, and we never shall so long as the fight lasts. On the essentially true but literally false phrase about a “single reactionary mass,” the Social Democracy has never believed since it passed from the realm of theory to that of practice. We know that the individual members and divisions of the “single reactionary mass” are in conflict with each other, and we have always used these conflicts for our purposes. We have used opponents against opponents, but have never allowed them to use us."

“What is it that has made of us in Germany the pivotal part? ... It is the avalanche-like increase of our supporters that gradually, with the certainty of a natural law, or more correctly of a natural force, grows from tens of thousands to hundreds of thousands, and from hundreds of thousands to millions, and is daily increasing, bidding defiance to our opponents and driving them into impotent rage. And this avalanche-like increase has come, and is coming, as a consequence of our opposition to and struggle with all other parties.”

“It would be an unparalleled case of flying the track and going astray if the German Social Democracy, which has had such wonderful success and such a wonderful growth for the very reason that it has marched ahead unterrified on the basis of the class struggle, should suddenly face about and plunge into mistakes, the avoidance of which has been the power and pride of our party, and has put the German Social Democracy at the head of the international social democracy of all countries.”

“We Social Democrats dare not be like the other parties, all of whom are equally guilty of the injustices of the present system and equally responsible for them. Every one who suffers under these injustices looks to us for deliverance. Every one of us has had these victims of society after failing to get justice from the courts, from the government, from the Emperor himself, and from all the other parties, come to us as the last and only ones that can help them. They do not know our scientific program; they do not know what capital and capitalism mean; but they have the belief, the feeling, that we are a party that can help when all other parties fail. This belief is for us an inexhaustible source of power. It was a similar faith of despair that spread more and more in the decaying Roman empire and slowly undermined the heathen world until it finally collapsed. We give up this inexhaustible source of power if we ally ourselves with other parties and drive suffering humanity from us by saying to it: “We are not essentially different from the others.” Once the boundary line of the class struggle is wiped away and we have started upon the inclined plane of compromise, there is no stopping. Then we can only go down and down until there is nothing deeper.”

“We cannot traffic in our principles, we can make no compromise, no agreement with the ruling system. We must break with the ruling system and fight it to a finish. It must fall that socialism may arise, and we certainly cannot expect from the ruling class that it will give to itself and its domination the death blow.”

“Distrust was counted as a democratic virtue, and over-confidence as a democratic vice.”

“The highest triumph of Bismarckian politics carried its downfall and bankruptcy within it.”