but if I believe that Caesar was murdered on the Ides of March, what makes my belief true lies wholly outside the power of my will. Philosophies inspired by love of power find this situation unpleasant, and therefore set to work, in various ways, to undermine the common-sense conception of facts as the sources of truth or falsehood in beliefs. Hegelians maintain that truth does not consist in agreement with fact, but in the mutual consistency of the whole system of our beliefs. ... This gives freedom to creative fancy, which it liberates from the shackles of the supposed 'real' world.
Source: Power, 1938.
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