Book excerpt: Drawing on the work of Ludwig Wittgenstein and novelists such as Walker Percy, Paul Auster and Graham Greene, A Philosophical Disease brings to the bioethical discussion larger philosophical questions about the sense and significance of human life. Carl Elliott moves beyond the standard menu of bioethical issues to explore the relationship of illness to identity, and of mental illness to spiritual illness. He also examines the treatment of children born with ambiguous genitalia, the claims of Deaf culture, and the morality of self-sacrifice. This book focuses on a different sensibility in bioethics; how we use concepts, and how they relate to our own particular social institutions.