Dr. Benson knows that his rational-scientific audience will be skeptical of his arguements. So, he provides us with well-reasoned arguements supported by ample evidence. He explains that we need to relax our over-stressed minds on a regular basis. We need this as an antedote to our hurried lives that stress us out and make us sick. He cites many studies (much from his own research) that daily meditation stimulates the bodies natural healing mechanisms.
Now, the radical finding of Dr. Benson's research is that belief in God makes a difference in healing. If a person meditates regularly using a spiritual phrase they are more likely to heal than those who use a secular word such as »peace«. The person's religion doesn't matter. It seems that God is an equal opportunity healer.