Look wise, say nothing, and grunt. Speech was given to conceal thought.
The best preparation for tomorrow is to do today's work superbly well.
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.
Soap and water and common sense are the best disinfectants.
Medicine is a science of uncertainty and an art of probability.
To study the phenomena of disease without books is to sail an uncharted sea, while to study books without patients is not to go to sea at all.