Stages of Joy

I’d like to consider just for a moment the confluence of a sunny day, some metta practice on my part, and some contemplation of my own future as someone with potential. I can feel a wave of rapture. However, there are causes and conditions to this rapture. Moreover, this is just the first stage of joy, in Pali Pitti. Then there is a more mature stage of joy called Sukha, which is happiness or contentment. As we progress deeper into joy, it becomes subtler and tends towards equanimity. To just contemplate this makes me super happy.