How do we know God saves for His glory?

The salvation of believers is intimately linked to God's glory. Isaiah 61 expresses that God plants His elect as trees to bring Him glory, emphasizing that God's purpose in saving is primarily to reflect His greatness. In 1 Corinthians 1:26-29, Paul underscores that God's selection of the weak and despised ensures that all boasting is excluded, thus reinforcing the theme that salvation is entirely a work of God's grace, culminating in His glory. Therefore, every aspect of salvation points back to glorifying God.