I found this on the net: Biblical joy comes from the Lord. It is a perpetual gladness of the heart that comes from knowing, experiencing, and trusting Jesus. Martin Lloyd-Jones said, “joy, in other words, is the response and the reaction of the soul to a knowledge of the Lord Jesus Christ.”
Romans 5:1-5 Not only that, but we rejoice in our sufferings, knowing that suffering produces endurance, and endurance produces character, and character produces hope, and hope does not put us to shame, because God's love has been poured into our hearts through the Holy Spirit who has been given to us. Thank you Lord for giving us JOY!