The Physiology of Faith provides an insightful look at the wonders and marvels of the human body. It truly is God's greatest creation, and He originally intended it to function and prosper in health forever. The body was designed to defend itself, heal itself, and protect itself from all types of threats. It is a single organism with systems that work together in a complex organization of cells, tissues, bones, muscles, glands, and fluids, which have their own specific function. All of the systems work together in a unique harmony of purpose and design. However, when one system is not functioning properly, it will most often affect the others and result in sickness and disease. A person's health is made up of their every move, function, and thought, which are affected and influenced by what they eat, how they exercise, and how they deal with the daily challenges of life. Good health is more than the absence of disease. It is a state of complete physical, emotional, and mental well-being on all levels.