How does Dante the poet view his task of recording his vision of Heaven? What does he see as his purpose and mission?

Compare some of the different souls whom Dante meets in Heaven. How do they differ in their message to Dante and their view of life on earth? What wider virtues and ideals do they embody?

Perfection or purification of vision is one of the major themes of the Paradiso. How is this theme expressed through the relationship of Dante and Beatrice? How does Dante purify himself as he ascends through heaven?