He who studies medicine without books sails an uncharted sea, but he who studies medicine without patients does not go to sea at all.
William OslerFew diseases present greater difficulties in the way of diagnosis than malignant endocarditis, difficulties which in many cases are practi- cally insurmountable. It is no disparagement to the many skilled physicians who have put their cases upon record to say that, in fully one-half the diagnosis was made post mortem.
William Osler