Variability 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 OslerThat man can interrogate as well as observe nature was a lesson slowly learned in his evolution.
William OslerThe teacher's life should have three periods, study until twenty-five, investigation until forty, profession until sixty, at which age I would have him retired on a double allowance.
William Osler