Looking for understanding as I delight in and wrestle with the Reality of the psalms (subjective genitive) - this quote from a comment of Phil Sumpter 2 years ago seems very apt. HT Phil himself in another comment.
The New Testament is more than just the second act of an ongoing story, it’s our ‘library card’ to the OT, in that only through and in Christ we have access to the voice of God and the privilege to count ourselves as its addressee. Jesus constitutes our right to be readers and this has profound hermeneutical implications.There was a long discussion on 'in Christ' at the Better Bibles Blog. I hope it won't disappear at that address, but it is to be noted that Phil uses the phrase without comment above and shows how it perfectly captures the pouring out of the Spirit on all flesh. Library card is an interesting metaphor for today. It assumes we have learned how to use a library and that we have confidence in our ability to find the funds for the annual renewal!