Proverbs 17:22 A merry heart does good, like medicine, But a broken spirit dries the bones.
Being happy and content makes a huge difference to our bodies and not just our outlook in life. A heart full of spiritual joy and peace raises our spirits, even invigorating our bodies and makes us ready to face things.
But when we are unhappy, down or feeling low, our bodies begin to suffer as well because we are not caring for them as we would normally.
Fill yourself with God. Fill yourself with His Word and fully depend on Him to bring your spirits up because the benefits are greater than you think!