Answer: Change Blindness.
"Change Blindness" is when a person [or group] looks at two seemingly identical pictures or scenes and misses important visual changes from one scene to the next or one picture to the next. The person believes that they are still looking at the same exact image as the first.
Even though something in the second picture is very different from the first, they don't see it. It's a gap in perception.
Here's a short video on change blindness:
Watch Change Blindness on PBS. See more from NOVA scienceNOW.
Another Example:
Look at this short video called, "The Big Fish." Did you notice the change in the scene?
How the Church has missed the dramatic change in our core nature...our heart:
Here's how change blindness has occured in much of the Church today: Many Christians believe that the New Covenant message of 'grace' means that their heart is still just as deceitful as ever, or only somewhat improved from before, yet Jesus will work in them despite their still unfaithful heart.
*In other words, they believe that their true nature [heart] has been left unchanged, even after they've come to Christ. They mistakenly think that their nature [heart] is still corrupted by sin, and that Jesus must work around that diseased and corrupt heart. Like the subjects in the video you just watched, Christians are missing the change: something was replaced with something else.
The real offer of God:
Grace means that an old, "prone to wander" heart was surgically removed -- replaced with the supernaturally-good heart of Jesus. His heart now throbs within you, and has taken on your unique God-given desires, gifts, and temperment.
The dramatic change we missed is this: Your heart is no longer prone to wander, because that heart doesn't exist anymore. It was burned up by Jesus' indwelling righteousness. Just like the change from one picture to the next, the old has gone [it no longer exists] and the new heart has taken its place.
Your "flesh" [some residual and often strong programming left over from before] still exists, but that's not the authentic you. Paul points this out in Romans 7: "It is no longer I who sins..."
................................................................................................................................
Your heart is now your ally and not your enemy: Once you see that, change blindness can no longer keep you pinned down.
P.S. If you missed what changed in the "Big Fish" video, look for something large and yellow.