The amount of light inside people and how pure the light is can make them see things differently. Don't be surprised when different people with different orientations interpret things differently or miss/see things you see or thought are not there...(You'll have to know and understand the information they consume to know why they see things differently.)
For example, a person without full light who is viewing a physical coin will focus more and understand the part of the coin his light shines on. And this understanding could be wrong if the light is false. The brighter the light the better.
Feed them with true light, if they believe, their perception of things will change for good. And then they become free from their prison.