Rationalism in politics, as I have interpreted it, involves an identifiable error, a misconception with regard to the nature of human knowledge, which amounts to a corruption of the mind. And consequently it is without the power to correct its own short-comings; it has no homeopathic quality; you cannot escape its errors by becoming more sincerely or more profoundly rationalistic.

Rationalism in Politics and other essays (1962) - Rationalism in Politics (1947)