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Neither the good nor the true is self-realizing, so it is not generally a sufficient explanation of why people believe that X is true, or of why people do Y that Y is good.

"Philosophy and Real Politics". Book by Raymond Geuss, 2008.
Neither the good nor the true is self-realizing, so it is not generally a sufficient explanation of why people believe that X is true, or of why people do Y that Y is good.