The inclusion of several important figures within Paradise adds a very interesting aspect to Dante's writing. It is clear that he chose the names of these people very carefully and there is no one within Paradise who does not belong there. This adds a very interesting dynamic to the writing because it makes it more relate-able. While none of the great figures within the text are in the least bit common people, all of them have some kind of written works which makes them more accessible. This is very purposeful on Dante's part. Yes, all of these people were wonderful, but they also offer up an example. It is quite probably that Dante did this in order to spark the interest of his readers so that they would go and read the others. In an odd way it is as if Dante is providing free advertising for these great people's works and ideas.
Authors today could learn a lot form Dante. He supports other writers within his texts and even indirectly encourages people to go and read them for themselves. Authors would appear a lot more trustworthy is they followed this example. Dante had an interesting way of showing his sources of inspiration.


P.S. I commented on Collin's post