The Witness made the connection to the Ghosts prior to having the Veil. As all sentient entities are connected by Darkness, that was what Strand revealed to us in LF. It is solely through his mastery of Darkness that he did this. Ghosts are conscious entities, so they are connected. Minds = souls But the kicker is that not only are Ghosts made of Light but they are broken off fragments of the Gardeners consciousness itself. As detailed in Ghost Lore, We before Us. Making them inherently, by their very original and nature, connected to Darkness. All we So to make a sentient entity requires both Light (to make the body) and Darkness (to make the mind) So the twist that has been slowly building up is the two powers are naturally intertwined. You can’t stop or end Darkness, it’s a manifestion of natural law. Just like Light.