"And now, behold, the hand of the Lord is upon thee, and thou shalt be blind not seeing the sun for a season. And immediately there fell on him a mist and a darkness; and he went about seeking some to lead him by the hand." (Acts 13:11)

This is "Saul (who also is called Paul)" (13:9) speaking to "Elymas the sorceror". I suppose to receive this kind of first hand treatment from God wouldn't be a bad thing in retrospect. David says "For day and night Thy hand was heavy upon me:" (Psalm 32:4). Elymas' way had so attracted the attention of God and as Paul made his way through that area, coming into the company of Sergius Paulus, Elymas' number was called. As he was essentially a wizard, using spiritual auspices to channel things that weren't in keeping with the Gospel, God had to shut him down. But notice, in spite of Paul declaring he was a "child of the devil" (13:10), he also offers a more hopeful prognosis. As an aside, I'm loath to tell someone to "go to hell". But if I tack on "and stay a while", perhaps that wouldn't be so bad? Perhaps it would.

"The Spirit of the Lord is upon me, because He hath anointed me to preach the gospel to the poor; He hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised, To preach the acceptable year of the Lord." (Luke 4:18-19, emphasis mine)

Also known as "day blindness", hemeralopia is an inability to see during the day. When it's night, things are clear. But the extra light, I suppose, cannot be dealt with correctly. When Jesus says "the acceptable day of the Lord", this is what was inaugurated with His life and ratified with His death and resurrection. The Holy Spirit is shining and the more you acknowledge His presence, the brighter He gets. The more He will shine through the darkness in which this world still turns. This is what Jesus was aiming at.

There are all sorts of tangents we can get off on when sensitive to a spiritual source. But the thing is, there are only two sources and Elymas was connected to one of darkness. This is why, rather than let him fall into the abyss down which he gazed, God stayed him by physically blinding Him that he would be able to see, internally, where he'd been wrong all along.

Anytime we would continue to live in a way that is not pleasing to God, we attract the attention of those living in the light. And as they walk with the Lord, praying for what they see in you, His light will diffuse into you and open your eyes.

Official Transcript

First Words (Childish Things part 5)