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