I think there are levels of Christians...it's obvious..
We get the true believers , I call them the believing believers. The 100% ers.
Then there is the 60% ers... Believers, but just riding a bed of roses into heaven...
Then the 30%ers ...Sundays only.
Then the rest of the bunch...carnal Christians found in the books Paul was writing to. Walking with one foot in the kingdom and one foot in the world. Laodicea ...neither hot nor cold...but He says to them.
"I counsel thee to buy ( invest) of Me gold tried in the fire, that thou mayest be rich; and white raiment, that thou mayest be clothed, and that the shame of thy nakedness do not appear; and anoint thine eyes with eyesalve, that thou mayest see."
His word to them is still redemptive. The stupid sheep may have gone astray, but it is not lost..He will still go after it and bring it back to the fold...it didn't change suddenly from being a sheep.
I have my thoughts on Judas... :)
I don't think to many people have had the actual satan enter into them..evil spirits yes..but not Satan! Satan clothed himself with Judas to do the deed. But, that just my thoughts.