F. F. Bruce titles a chapter in in his book, The Canon of Scripture, “The Old Testament becomes a New Book.” By this he means that with the coming of Christ it became a Christian book. Its meaning was illuminated so that it was no longer understood as merely a Jewish book, but as a book explicitly about Christ. And the Apostles plainly stated that this was so.

   According to the Acts of the Apostles, the early preaching of the gospel to Jews and God-fearing Gentiles was regularly marked by the appeal to the fulfillment of Old Testament scripture in the work of Jesus. It is to him, Peter assures Cornelius, that ‘all the prophets bear witness’ (Acts 10:43). When Philip is asked by the Ethiopian on his homeward journey from Jerusalem to whom the prophet is referring as he describes the suffering of the Isaianic Servant, Philip does not hesitate: ‘beginning with this scripture he told him the good news of Jesus’ (Acts 8:35). The impression given in Acts is confirmed by Paul: ‘the gospel of God . . . concerning his Son’, he says, was ‘promised beforehand through his prophets in the holy scriptures’ (Rom. 1:1–3), and throughout his exposition of the gospel in the letter to the Romans he shows in detail what he means by this. Thanks to the illumination thrown on them by their fulfilment in Christ, the ancient scriptures became a new and meaningful book to the early Christians. The prophets themselves, we are assured in 1 Pet 1:10–12, had to search hard to find out ‘what person or time was indicated by the Spirit of Christ within them when predicting the sufferings of Christ and the subsequent glory’; they had to learn that their ministry was designed for the generation which witnessed the fulfillment of what they foretold.
   Various figures of Old Testament expectation were now identified with Christ—the prophet like Moses (Deut. 18:15–19), the son of David (2 Sam. 7:12–16), the servant of Yahweh (Is. 42:1, etc.), the righteous sufferer (Ps. 22:1, etc.), the stricken shepherd (Zech. 13:7), and others. It is not simply that a number of texts out of context are given in a Christian significance: the New Testament interpretation of a few Old Testament words or sentences actually quoted often implies the total context in which these word or sentences occur. Moreover, different New Testament writers will quote different words from the same context in a manner which suggests that the whole context had been given a Christian interpretation before those writers quoted from it. It has been pointed out, for example, that from Ps, 69:9 (‘zeal for thy house has consumed me, and the insults of those who insult thee have fallen on me’) the former part is applied to Jesus’ cleansing of the temple in John 2:17 and the later part to his patient endurance verbal abuse in Romans 15:3. While no one is likely to maintain that the one writer has influenced the other, ‘it would be too much of a coincidence if the two writers independently happened to cite the two halves of a single verse, unless they were both aware that at least this whole verse, if not any more of the Psalm, formed part of a scheme of scriptural passages generally held to be especially significant’. This implies something more substantial in the way of primitive Christian exegesis than a chain of isolated proof-texts of ‘testimonies’.

—F. F. Bruce, The Canon of Scripture (InterVarsity Press, 1988), 56–57.