A heart at peace gives life to the body, but envy rots the bones. According to Proverbs 14:30, having inner peace and calmness provides health and life to the physical body, while envy destroys the person from the inside in the same way that rottenness destroys bones. The passage is referenced multiple times in a presentation about having a tranquil heart and mind leading to better physical well-being, while negative emotions like envy can harm the body.