"It is what we know already that often prevents us from learning."
"When entering on new ground we must not be afraid to express even risky ideas so as to stimulate research in all directions. As Priestley put it, we must not remain inactive through false modesty based on fear of being mistaken."
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Source: Claude Bernard (2012). “An Introduction to the Study of Experimental Medicine”, p.185, Courier Corporation
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"The experimenter who does not know what he is looking for will not understand what he finds."
"When we meet a fact which contradicts a prevailing theory, we must accept the fact and abandon the theory, even when the theory is supported by great names and generally accepted."
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