Sight to the Blind

I read once that the difficulty of Jesus' type of ministry isn't giving sight to the blind....its teaching people who can see that they might really be blind.

^{Isaiah 42:16-17} I will lead the blind by a way they did not know; I will guide them on paths they have not known. I will turn darkness to light in front of them and rough places to level ground. This is what I will do for them, and I will not forsake them. They will be turned back and utterly ashamed --those who trust in idols and say to metal-plated images "You are our gods!"[my emphasis added]

From cover to cover, the Bible is about God healing the blind.

When I read this passage I think of my own past blindness. As someone who was pretty good, didn't really do anything that bad, and believed that my own goodness, or my effort to try and make the right decisions was what God asked of His creation.
Amazing Grace, How sweet the sound, that saved a wretch like me, I once was lost but now I'm found, was blind but now I see.