One more thought on the Paradiso – in some ways sphere 9 and 10 are repeating the overall idea of Dante of how both philosophy and theology are paths to deep truths, but theology embeds it all.
Sphere 9 is in many ways as deep as you can go with Aristotle, with the First Mover and the origin of Motion, which starts existence itself.
Sphere 10 goes to the bottom of Theology, and ends on the last page with the mystery of the connection and relationship between the Human and the Divine, as a glowing mystery in the deep of our souls.
So the Paradiso ends with a double layer of the highest endeavors of grasping and contemplating Life and Existence – with Aristotle, and then with the Biblical Stories.