There is a County Western song that says that you can’t buy happiness, but you can buy dirt. I believe that happiness comes from circumstances. And there are times when happiness is nowhere to be found. Joy and Peace are available to believers 24/7 regardless of the circumstances. Joy and Peace are a gift that God has for us.
Romans 15:13 (ESV)
13 May the God of hope fill you with all joy and peace in believing, so that by the power of the Holy Spirit you may abound in hope.