"It is a great satisfaction to know that my work has contributed to the well-being of humanity."

"It was a great moment when I first saw the tubercle bacilli under the microscope."

"The discovery of the cause of a disease is only the first step towards its eradication."

"As soon as I had found the tubercle bacillus, I found it also in the sputum of phthisical patients."

"It is a great responsibility to be a physician, for upon us depends the health of the community."