A happy heart is good medicine and a cheerful mind works healing, but a broken spirit dries up the bone. For more reading (Proverbs 17:22). How much plainer could it be said? A person who is happy, light- hearted, and cheerful will be healthy. An angry person is neither cheerful nor happy, and very likely not healthy either.
God’s word not only tells us that happiness leads to good health, but it also tells us how to experience happiness.
N:B: In short, just be happy no matter the situation you are in. A positive mind gets you somewhere, a negative mind won’t survive the situation.