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“The only way we can get rid of this desire to cling to our prejudices, is thoroughly to convince ourselves of the superiority of the truth; to leave not the slightest doubt in our own minds as to the value of looking with perfect indifference on all questions; to see that this is more advantageous than believing in that opinion which would benefit us most if true, more important than “being consistent,” more to be cherished than the comfortable feeling of certainty.”