If it were not for the great variability among individuals, medicine might as well be a science, not an art.
William OslerThat man can interrogate as well as observe nature was a lesson slowly learned in his evolution.
William OslerThe hardest conviction to get into the mind of a beginner is that the education upon which he is engaged is not a college course, not a medical course, but a life course, for which the work of a few years under teachers is but a preparation.
William OslerVariability is the law of life, and as no two faces are the same, so no two bodies are alike, and no two individuals react alike and behave alike under the abnormal conditions which we know as disease.
William Osler