The sermon establishes a Christ-centered hermeneutic as the essential framework for interpreting Scripture, emphasizing that Jesus is the unifying theme connecting the Old and New Testaments. It distinguishes between the Covenant of Works, which requires perfect obedience and leads to condemnation after the Fall, and the Covenant of Grace, which offers salvation solely through faith in Christ's finished work. The speaker warns against theological errors like Pelagianism and Arminianism that attempt to mix human effort with divine grace, arguing that such synergism undermines the monergistic nature of salvation. By maintaining this distinct covenantal structure, believers can correctly understand biblical continuity and avoid the error of Biblicism or legalism. The message concludes by urging reliance on God's sole initiative in redemption to ensure proper theological clarity and assurance.