Change your thinking, change your health.

A New York physician said, "People can actually die because they lose their enthusiasm.  The physical organism cannot handle the mental attitude of uselessness."  Another physician was asked to appraise the psychological advantages of optimism over depression.  "Depressive thoughts, habitually held, increase the possibility of infection by at least 10 fold.  Optimism, real faith and enthusiasm taken together are powerful agents in burning out infection.  I have noticed that people who maintain a confident attitude show greater healing power in the presence of sickness and disease.  Enthusiasm is one of the greatest sources of health."

This simply validates these wise sayings of the Bible, "A merry heart does good like medicine" and "A merry heart is a continual feast."