How does Jefferson change?

When Wiggins begins his visits, Jefferson greets him with silence, the whites of his eyes bloodshot. Jefferson later replaces his silence with talk full of self-disgust and a sense of hopelessness. After months of visits, though, Jefferson begins to question Wiggins about God and heaven, his nannan, and life. Wiggins brings Jefferson a radio; they share a favorite announcer. He also gives Jefferson a notebook. Jefferson writes in the notebook until his death on Good Friday in April. From their conversations during Jefferson's last days and the journal Jefferson has kept, Wiggins learns that to be a teacher, one has to believe. He concludes that Jefferson is the true teacher.