• 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.

• We are here to add what we can to life, not to get what we can from it.

• Shut out all of your past except that which will help you weather your tomorrows.

• In science the credit goes to the man who convinces the world, not to the man to whom the idea first occurs.

• Live neither in the past nor in the future, but let each day's work absorb your entire energies, and satisfy your widest ambition.

• One of the first duties of the physician is to educate the masses not to take medicine.

• Look wise, say nothing, and grunt. Speech was given to conceal thought.

• The desire to take medicine is perhaps the greatest feature which distinguishes man from animals.