The groundwork of all happiness is health. (Leigh Hunt, 19th century English poet)
Healthy people are more likely to be happy than those who suffer physically. Yet, there are many who’ve maintained a happy spirit in spite of their ills. Think of blind and deaf Helen Keller, whose life was a testimony of overcoming enormous handicaps with a positive attitude. In the all-important realm of the spirit, real joy is the result of a healthy relationship with God.
My health may fail, and my spirit may grow weak, but God remains the strength of my heart; he is mine forever. (Psalm 73:26)