Look wise, say nothing, and grunt. Speech was given to conceal thought. — Sir William Osler. Canadian physician and co-founder of Johns Hopkins Hospital (1849–1919) Speech
To study the phenomenon of disease without books is to sail an uncharted sea, while to study books without patients is not to go to sea at all.
Live neither in the past nor in the future, but let each day's work absorb your entire energies, and satisfy your widest ambition.