What do the law and the prophets testify about?

The law and the prophets serve as a testament to Christ's redemptive work. Romans 3:21-22 states that 'the righteousness of God without the law is manifested, being witnessed by the law and the prophets.' This means that the Old Testament points towards the necessity of Jesus' death and resurrection for the righteousness required by God. The sacrificial system and the prophecies throughout the scriptures culminate in the revelation of Jesus as the promised Messiah who fulfills the requirements of the law on behalf of His people, thus highlighting the need for His atoning sacrifice.