"Labyrinths of Medicine and Morality: Arrowsmith" is a novel by the American writer Sinclair Lewis, which combines important ethical questions and problems of modern medicine. The main character of the work, Martin Arrowsmith, is a dedicated doctor who values the lives of his patients more than his own comfort. He constantly rethinks his ideas about medical ethics and a professional doctor. The novel not only tells the story of one doctor, but also questions the conventional concepts of medical practice, offering readers candid reflections on the boundaries between scientific research, morality and human ambition. In this book, Lewis successfully combined social criticism with psychological depth, revealing important aspects of the modern world through the lens of medicine and morality.