The Scripture's coherence is Christotelic, and its relevance is Ecclesiotelic. Christ is the end (Greek, telos) of Israel's story and so gives the entire story its unifying, coherent structure - much as the climax of a well-crafted story puts the pieces of the novel together in wonderful and exciting ways. And that Christotelic coherence is properly embodied only in the church, the body of Christ. The proper application of Israel's story - its true relevance - is in God's newly reconstituted people whose identities are found entirely in their union with Christ and his saving work.
Peter Enns in Some Thoughts on Theological Exegesis of The Old Testament: Toward a Viable Model of Biblical Coherence and Relevance