The first requisite of success is the ability to apply your physical and mental energies to one problem without growing weary.
Thomas A. EdisonFive percent of the people think; ten percent of the people think they think; and the other eighty-five percent would rather die than think.
Thomas A. EdisonNineteen hundred and three will bring great advances in surgery, in the study of bacteria, in the knowledge of the cause and prevention of disease. Medicine is played out. Every new discovery of bacteria shows us all the more convincingly that we have been wrong and that the million tons of stuff we have taken was all useless.
Thomas A. Edison