I love all the verses on the "heart". I think we have yet to see what impact life and circumstances have on our hearts.
Prov. 15:13 A happy heart makes the face cheerful, but heartache crushes the spirit.
Prov. 15:14 The discerning heart seeks knowledge, but the mouth of a fool feeds on folly.
Prov. 15:15 All the days of the oppressed are wretched, but the cheerful heart has a continual feast.
Prov. 15:28 The heart of the righteous weighs its answers, but the mouth of the wicked gushes evil.
Prov. 15:30 A cheerful look brings joy to the heart, and good news gives health to the bones.
I really want a happy, discerning and cheerful heart. It will be a continual feast and health to my bones.