In some Old Testament books, it's very evident that an editor has been at work. That's quite all right. It's part of the process.

Christianity has stayed stable, as it must do. The doctrines don't change. The understanding of what it means to walk with God doesn't change. The reality of worship doesn't change, not at heart, anyway. So Christianity appears to be stuck.

I'm saying that an editorial process that is preparing the material for publication counts as part of the inspiring process whereby God, in his sovereignty, gave every word.

J. I. Packer Quotes