Whoever finds that further investigation puts at variance his earlier theories, and has the courage to expose the fallacies which led to them, is on the right road to truth. When misplaced fidelity to a wrong concept is praised in the name of honourable consistency, it bars the road to truth. A man who fears fundamentally to revise earlier conclusions, because he fears that his reputation for reliability will be damaged, may save his reputation but will forfeit more than he saves. Therefore, let us not pretend to be surprised when further effort is crowned with truer comprehension.
-- Notebooks Category 12: Reflections > Chapter 5: The Literary Work > # 163