“I Am the Light of the World” (John 8:12; 9:5)

“I Am the Light of the World” (John 8:12; 9:5)
Where do we see connections in John’s Gospel between physical/temporal things and spiritual/eternal truths?
What key elements or metaphors to this passage in John 9 are we introduced to in chapter 1?
What Old Testament prophecies are being fulfilled in John 9?
What does it mean to know Jesus is “the Light of the World”? What does Jesus enable us to see rightly?