Well-observed facts, though brought to light by passing theories, will never die; they are the material on which alone the house of science will at last be built.
Claude BernardWe must keep our freedom of mind, ... and must believe that in nature what is absurd, according to our theories, is not always impossible.
Claude Bernard[Those] who have an excessive faith in their theories or in their ideas are not only poorly disposed to make discoveries, but they also make very poor observations.
Claude BernardThe first entirely vital action, so termed because it is not effected outside the influence of life, consists in the creation of the glycogenic material in the living hepatic tissue. The second entirely chemical action, which can be effected outside the influence of life, consists in the transformation of the glycogenic material into sugar by means of a ferment.
Claude Bernard