excerpt from D. Chopra Blog on Faith Healing.

Faith Healing, from Jesus to Neurotransmitters

Deepak Chopra

"My own view is that faith is a small part of the enormous field of consciousness. In our drugs-and-surgery society, we don't take enough advantage of non-material approaches. For example, studies in heart disease led by George Vaillant, in the 1950s tried to explain premature heart attacks, then at epidemic levels. Vaillant found a mild correlation between artery disease and high cholesterol levels. This finding changed the course of treatment, ignoring the stronger correlation he found, which didn't fit the materialistic model.
Men who faced their psychological problems in their twenties were considerably less likely to have a premature heart attack then men who didn't. And the evidence for the existence of a "cancer personality" has gained credibility through studies that show certain traits, such as suppression of emotion, raise the risk of many diseases (although a specific connection to cancer remains tenuous).

Although the deleterious of stress and its connection to the major epidemics of our time such as heart disease, cancer, and infection have been well documented over several decades, there has been little research on what peace of mind does to our biology. I can see how a sense of "peace that passes understanding", and an internal state of euphoria, could lead to healing. There is more and more evidence that when the mind is at peace and also happy, there are biological consequences. An internal state such as this is more than mere subjective well being.

Neurotransmitters such as dopamine, oxytocin, opiates, and serotonin are simultaneously secreted.
These neurotransmitters are associated with euphoria, self confidence, and a pleasurable feeling. They also happen to be immunomodulators, in that they fine tune the activity of the immune system and are associated with a return to homeostasis (Homeostasis is a state of dynamic non change in our biology in the midst of a changing environment. Disease is a disruption of homeostasis.) It is, therefore, becoming increasing clear, that the mind and body are inseparably one and that which we call faith is an important component in the phenomenon of healing. It is no accident that the word health, the word healing, and the word holy, all imply a return to the memory of wholeness.

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Faith Healing, from Jesus to Neurotransmitters

Deepak Chopra - June 10, 2008

https://www.intentblog.com/archives/2008/06/faith_healing_f.html