Book excerpt: This is the compelling and ; inspirational true story of a twentieth-century doctor ; and saint. Giuseppe Moscati, born of an aristocratic family in Naples, Italy, ; devoted his medical career to serving the poor. He was also a medical school ; professor and a pioneer in the field of biochemistry, whose research led to the ; discovery of insulin as a cure for diabetes. Moscati regarded his medical ; practice as an apostolate, a ministry to his suffering fellowmen. Before examining ; a patient or engaging in research he would place himself in the presence of God. ; Moscati treated poor patients free of charge, and he would often send them home ; with an envelope containing a prescription and a fifty-lire note. He could have ; pursued a brilliant academic career, taken a professorial chair, and devoted more ; time to research, but he continued to serve his beloved patients and to train ; dedicated interns. By the witness of his example, he taught his many ; medical students to practice their profession in a spirit of service, saying that ; "suffering should be treated not as just pain of the body, but as the cry of a soul, ; to whom another brother, the doctor, runs with the ardent love of charity. . . [The ; sick] are the faces of Jesus Christ, and the Gospel precept urges us to love them ; as ourselves."