In The Divine Comedy by Dante, how did the main character, Dante, reeducate his will toward goodness when he took the journey?

Dante's will was reeducated toward goodness on his journey through the levels of the
after-life by encounters with spirits who told their stories at each level; by discourse with
the poet Virgil; by the guidance of his beloved Beatrice; by examination by the Saints in the
eighth Paradise; and by the recommended prayers of Saint Bernard.

With
Virgil as his guide and beginning at shores of suffering that led to the ten lower realms, Dante
began with an encountered with those being punished for having no regard for good or evil and
descended through ten dank regions, ending with...