There is no more difficult art to acquire than the art of observation, and for some men it is quite as difficult to record an observation in brief and plain language.
William OslerAcquire the art of detachment, the virtue of method, and the quality of thoroughness, but above all the grace of humility.
William OslerA man is sane morally at thirty, rich mentally at forty, wise spiritually at fifty-or never!
William Osler