The Justification and Kingdom of God series seeks to answer the question: "How can justified Christians in Jesus bear the fruit of faith, reflecting growth in God's image?" To address this, the series helps readers understand what happens to the image-bearers of God in Adam or in Jesus Christ. This reveals the deeper meaning of the gospel and the restoration of God's image, uncovering hidden treasures. Now, the challenge is whether the reader will accept these treasures. The Kingdom of Justification strengthens readers with the truth that eternal life—becoming the children of the living God through Jesus's perfect obedience—includes the restoration of God's image in Jesus. This restoration, achieved through Jesus, defines human wisdom, knowledge, righteousness, holiness, and goodness in Christ as God's children. This book warns against following intellectualism and moralism in liberals, which are driven by the marred image of God due to Adam's sin, as guides for one's thoughts and actions. Justification by God's grace alone is the foundation of true Christian growth in Jesus, the core of a Christian's identity, and the source of gratitude, joy, and peace. This book continually encourages readers, "Don't give up on yourself! You are a child of God!"