A heart at peace gives life to the body, but envy rots the bones. Proverbs 14:30 (NIV)
The true meaning of peace is nothing missing, nothing broken. When our heart from which flow the forces of life is at peace then we are truly whole. But when the heart is troubled, broken, or sick it affects the rest of the person, it gets into and is seen in our body. That’s why Jesus told us not to let our heart be troubled – John 14:1a. That means we can determine and control the state of our heart whether troubled or at peace. It’s what we think and believe that determines the state of our heart. Jesus told us the way we keep our hearts not troubled or at peace is by believing or trusting in God – John 14:1b A mind focused on God is trusting God and this produces perfect peace – Isaiah 26:3. This is life for the body.