We shall never go wrong if we do what is opposed to the interests of our enemy. On the other hand, we shall almost never go right if we do what our e… - Wilhelm Liebknecht

Diversity of opinions on theoretical points is never dangerous to the party. There are for us no bounds to criticism, and however great our respect may be for the founders and pioneers of our party, we recognize no infallibility and no other authority than science, whose sphere is ever widening and continually proves what it previously held as truths to be errors; destroys the old decayed foundations and creates new ones; does not stand still for an instant; but in perpetual advance moves remorselessly over every dogmatic belief.

The bureaucratic, though capitalistic, spirit of our governments tends towards a which, in fact, is only , but which is dazzling and misleading for those who are easily deceived by external similarities and catch words. The German, or more accurately the Prussian, state socialism whose ideal is a military, landlord and police state, hates democracy above everything else. ... It is to them something inherently political. But all politics is diametrically opposed to what is socialist. So by this trick logic we arrive at the conclusion which has gained footing here and there, even in social democratic circles, that democracy as savoring of politics has nothing in common with socialism, but on the contrary is opposed to it. ... But the truth is that democracy is not a thing that is specifically political, and we must never forget that we are not merely a socialist party, but a social democratic party because we have perceived that socialism and democracy are inseparable.

Our program was a scientific one it must be constantly changed at minor points to meet the continuous advance of science. And I maintain that no man – Marx, in spite of his comprehensive and deep intellect, as little as any other – can bring science to final perfection; and this position is for everyone who understands the nature of science a foregone conclusion. No socialist, therefore, has the right to condemn attacks on the theoretical ideas of the Marxian teachings or to excommunicate any one from the party because of such attacks. But it is wholly different when such attacks imply a complete overturning of our whole conception of society, as, for example, is the case with Bernstein. Then vigorous defense is in order. Far more dangerous than theoretical assaults are practical disavowals of our principles. Theoretical discussions interest only a comparatively small portion of our membership; whereas practical disavowal of principles and tactical offenses against the party program touch every party comrade and arouse the attention of every party comrade; and when they are not quickly checked and corrected they bring confusion into the whole party.