Isaiah proclaims that God will pierce the gloom of judgment with a great light, bringing joy, freedom, and enduring peace to a people who walked in deep darkness. This hope is fulfilled in Jesus Christ—the promised Son who reigns with justice and righteousness and will ultimately end oppression and conflict forever. Because the zeal of the LORD will accomplish it, sinners are invited to repent, trust in Christ, and hold fast to sure hope even in present darkness.