“A merry heart does good, like medicine, But a broken spirit dries the bones”. (Proverbs 17:22 NKJV).
“Anxiety in the heart of man causes depression, But a good word makes it glad”. (Proverbs 12:25 NKJV).
“A merry heart makes a cheerful countenance, But by sorrow of the heart the spirit is broken. The heart of him who has understanding seeks knowledge, But the mouth of fools feeds on foolishness. All the days of the afflicted are evil, But he who is of a merry heart has a continual feast”. (Proverbs 15:13-15 NKJV).