Lecture XVIII

I think that it may after all be necessary to introduce into our medical and biological study what we might term an inquiry into tho real origins of pathological conditions. Of late there has been a cumulative tendency to disregard the origins proper, and to fix attention on superficial appearances and events. And with this superficiality is bound up the habit in current medicine and pathology of beginning the description of a disease by stating what bacillus caused the disease by invading the human organism. Of course it is very easy to refute arguments and objections against the invasion of micro-organisms, for the simple reason that we no longer need to point out that these micro-organisms really exist. And since they have different characteristics in different diseases, it is again quite comprehensible that stress is laid on these differences, and specific diseases linked with specific types of micro-organisms.