Medicine was an integral part of the modern mission movement of the 19th century. Because Christianity has always affirmed the importance of the body, hospitals soon followed wherever missionaries went. This is another way the Church has been essential throughout history. Many Christians and critics today are skeptical that the Church is essential or necessary in the modern world. It is.
Far from being an otherworldly religion, Christianity teaches both the importance and goodness of life in this world. In fact, from Jesus’ healing ministry to the work of modern missionary doctors, a consistent feature of the work of the Church in the world has been to care for the sick and needy, and not just point them to the life to come.
The early Church understood Jesus’ ministry to be a paradigm for their own work. So, just as Jesus set believers free from their bondage to sin, early Christians purchased slaves specifically to free them. Whereas Jesus used miraculous power to heal people from physical effects of the Fall, Christians used more ordinary tools to care for the sick and disabled. These activities are not merely good deeds in themselves but serve to advance the Kingdom. Though the Gospel is a message and must be proclaimed, the early Church saw works of mercy and preaching the Gospel as two sides of the same coin.
The first major epidemic faced by the Church was the Antonine Plague (A.D. 166-189). In fear of their lives, the Romans threw the sick out of their homes to die in the streets. Galen, the most prominent physician of the age, knew he could neither heal its victims nor protect himself. So, he fled Rome to stay at his country estate.
Recognizing that all persons were made in the image of God and that Jesus came to make all things new, body and soul, many Christians ran the other direction. They fought the Fall by tending to the sick, at risk (and often at the cost) of their own lives.
Since even basic nursing care can make a significant difference during an epidemic, Christian action saved lives. Their courage and self-sacrifice contributed to the rapid growth of Christianity.