According to John MacArthur, some years ago, the Mayo Clinic stated that statistically 80 percent of their total case load were ill either in reality or artificially due directly to mental stress. Also according to MacArthur, not too long ago, there appeared an article in a leading medical journal entitled, "Is Stress the Cause of All Disease?" The author of the article says that at the beginning of the century, bacteria were considered to be the center of attention. Today, mental stress has replaced bacteria.
-Sermons Illustrated May/June 1990