I lean toward Christ and His Church, but I did Learn how to read and the plain text says that something is Missing (lacking) in Christs Suffering and it must be added to. And we must add our own work. You can't say the sinners prayer and then go around glibly sinning to your hearts content and think you are heaven bound. You can't sit idly by and watch your neighbor suffer and think you are going to heaven, we must be Christ to the world, spreading His word and doing His work. You don't like it great but you are not a Christian by an stretch of the imagination then
So to sum it up your Jesus is not sufficient, you must help Him.
Ok, if that is what you learned in graduate school you really need to get your money back.
“...and the plain text says that something is Missing (lacking) in Christs Suffering and it must be added to. And we must add our own work.”
Your understanding is in direct contradiction to Hebrews 9:12 “With His own blood - not the blood of goats and calves - He entered the Most Holy Place once for all time and secured our redemption forever.”
Jesus’ sacrifice is not lacking in any way. You can try to add your pitiful good works on top of what Jesus did, but His work is the greatest of all and is sufficient.
If one is saved one doesn’t “glibly go around sinning”. You’re talking about someone who hasn’t been regenerated. They are playing church - not genuinely saved. There are many on that day who will say “Lord, Lord, have we not by thy Name prophesied, and by thy Name cast out devils? and by thy Name done many great works? And then will I profess to them, I never knew you, depart from me ye that work iniquity.” Matthew 7:22-23. Clearly works salvation/playing church is a one way ticket to Hell.