Liberalism is extremely harmful in a revolutionary collective. It is a corrosive which eats away unity, undermines cohesion, causes apathy and creates dissension. It robs the revolutionary ranks of compact organization and strict discipline, prevents policies from being carried through and alienates the Party organizations from the masses which the Party leads. It is an extremely bad tendency.
Liberalism stems from petty-bourgeois selfishness, it places personal interests first and the interests of the revolution second, and this gives rise to ideological, political and organizational liberalism.
People who are liberals look upon the principles of Marxism as abstract dogma. They approve of Marxism, but are not prepared to practice it or to practice it in full; they are not prepared to replace their liberalism by Marxism. These people have their Marxism, but they have their liberalism as well--they talk Marxism but practice liberalism; they apply Marxism to others but liberalism to themselves. They keep both kinds of goods in stock and find a use for each. This is how the minds of certain people work.
Combat Liberalism, 1937
We are fighting against subjectivism and sectarianism, but they will still have a hiding place to lurk in if at the same time we do not get rid of stereotyped Party writing. If we destroy that too, we shall "checkmate" subjectivism and sectarianism and make both these monsters show themselves in their true colors, and then we shall easily be able to annihilate them, like "rats running across the street with everyone yelling: Kill them! Kill them!"
Oppose Stereotyped Party Writing