Hebrews 12:18-29 contrasts two mountains—Mount Sinai and Mount Zion. Sinai, where the law was given, represents the old covenant where we are unable to approach a holy God. However, Mount Zion, through Christ and the new covenant, invites us to draw near. It’s a picture of grace, where the blood of Jesus speaks a better word, offering life and reconciliation. The two mountains reveal the law and gospel.