Michael Faraday...on self - criticism

The philosopher should be a man willing to listen to every suggestion, but determined to judge for himself. He should not be biased by appearances, have no favorite hypothesis, be of no school, and in doctrine have no master. He should not be a respector of persons but of things. Truth should be his primary object. If to these qualities he added industry, he may indeed go and hope to walk within the veil of the temple of Nature.

-Quoted in Sir Richard Gregory, Discovery