Divine Happiness is already defined by many people. But very few are really able to really able to understand its core meaning.
Divine Happiness means Happiness of the Divine . One Should only work for the Happiness Of The Divine. Let me elaborate it a bit further.
It simply means at every point of taking decision , think what i am doing now, will make Krishna Happy or Unhappy. If I scold anyone will Krishna be happy with me. If I do Sadhna poorly, just for the sake of completing the chanting rounds , will it make Krishna Happy. Your Heart will automatically tell you the right answer. If what you do will make Krishna unhappy, then don’t do that work. Thinking only from Krishna’s Happiness perspective is Divine Happiness.