How do we know God's purpose in Christ's death is for His glory?

The central purpose behind Christ's death on the cross is the glorification of God. Scripture consistently reveals that God acts for His glory. In John 17:4, Jesus states, 'I have glorified thee on the earth: I have finished the work which thou gavest me to do.' This aligns with Romans 3:26, proclaiming that God is just and the justifier of those who believe in Jesus. The attributes of God—His justice, mercy, and goodness—are all displayed in the cross, reflecting how salvation is fundamentally for the glory of God and showcases the depths of His love and justice.