„If man is but a biological organism and biology itself may be reduced to a set of physical and chemical laws, it should be possible to build up a biological science, a kind of biological mechanics, whose laws would rule the working and repair of the several pieces of the human machine. In such a case, there would be a 'medicine' or 'medical science'; and the doctor's task would consist in acquiring and maintaining an adequate knowledge of the laws of such a science and applying them so to speak in a uniform and automatic way, with hardly any meddling from his own personal criterion.
If, on the contrary, man is above all an eminently living being, every specimen of which is ever new and original, a being strongly influenced by ultra-physical faculties -- spirit, intellect, emotions -- if, in one word, man is a whole that can only be ruled from its own centre, medicine, then, will be but an art or a craft to be applied in each case to a concrete individual. And then, rather than 'medicine', there will be medicine-men.
Truth lies between these two poles, but gravitates definitely towards the second.“
Essays with a Purpose