Ardent desire for knowledge, in fact, is the one motive attracting and supporting investigators in their efforts; and just this knowledge, really grasped and yet always flying before them, becomes at once their sole torment and their sole happiness …. A man of science rises ever, in seeking truth; and if he never finds it in its wholeness, he discovers nevertheless very significant fragments; and these fragments of universal truth are precisely what constitutes science.

Claude Bernard (1813-1878) French physiologist, scientist

An Introduction to the Study of Experimental Medicine [Introduction à l’Étude de la Médecine Expérimentale] (1865)