Claude Bernard Quotes
It is impossible to devise an experiment without a preconceived idea; devising an experiment, we said, is putting a question; we never conceive a question without an idea which invites an answer. I consider it, therefore, an absolute principle that experiments must always be devised in view of a preconceived idea, no matter if the idea be not very clear nor very well defined.
Bernard, Claude. An Introduction to the Study of Experimental Medicine. Translated by Henry Copley Greene, Macmillan, 1927, p. 23.
Claude Bernard was a French physiologist. Historian I. Bernard Cohen of Harvard University called Bernard "one of the greatest of all men of science". Among many other accomplishments, he was one of the first to suggest the use of a blinded experiment to ensure the objectivity of scientific observations. He originated the term milieu intérieur, and the associated concept of homeostasis (the latter term being coined by Walter Cannon).