It is detached from all transient worldly concerns. It represents the unity of the spirit. For this joy there is no possibility of change. There is nothing that can be added to true joy. It is full and complete in itself.
True joy comes from equanimity.
Do not be carried away by or attach any importance to worldly things. Use your time and effort to control the vagaries of the mind and develop mental steadiness. Accept whatever happens, whatever comes your way, as the gift of God, to be enjoyed with great satisfaction, regarding it as a gift of love given to you for your own good. When your heart is not swayed by worldly things, when you treat all people and all things with equal mindedness, then you will experience true joy. Then your heart will be filled with feelings of love and satisfaction, and you will know the true joy of devotion.