Karl Mannheim Quote

The general form of the total conception of ideology is being used by the analyst when he has the courage to subject not just the adversary's point of view but all point of view, including his own, to the ideological analysis.
At the present stage of our understanding it is hardly possible to avoid this general formulation of the total conception of ideology, according to which the thought of all parties in all epochs is of an ideological character.

Ideology and Utopia (1929)