For those who will respond to Jesus’s chastening—who open the door to Jesus’s gentle knock—then Jesus would come in to dine together with them, certainly a reference both to God’s invitation in the Torah to feast with God, and to the love feasts of the early church, celebrating the Lord’s Supper.
You would think we would embrace grace wholeheartedly, we would be mad in love with grace. But, we are not. We have made a life that works in the world we know. Grace disrupts all that, and we can be just as prone to resist and reject as to revel and receive.
“ADONAI-RAPHA, Praise be the God Who heals, ADONAI, ADONAI, Almighty God, God of Majesty! I can SEE!” And what did the blind man see?