The man was congenitally blind. He had never seen a person; he had never seen a house; he had never seen a tree; he had never seen an animal.
It is rather similar when you are converted, when you come to Christ and you repent of your sin, and he opens your eyes, and you understand things. I understand so much more clearly: the gospel and my need, and Christ and what he has done. And every time I read the Bible, I am discovering things, you say to yourself. I never saw before. I see everything in a new light. It is wonderful, when you are first saved, the extensiveness and the work that God has carried out within you.