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

"The advancement of science is a collective effort, and I am proud to be a part of it."

"My work on tuberculosis was a labor of love."

"My only object has been to give the most complete description of the bacilli as they appear in the human body and in cultures."

"I have always believed that careful observation is the key to scientific discovery."