What does being called according to His purpose mean?

To be 'called according to His purpose' refers to God's sovereign choice to redeem a people for Himself, as elaborated in Romans 8:28-30. This call is not based on human merit or decision but God’s predetermined plan and foreknowledge. As Paul writes, those whom He foreknew, He also predestined to be conformed to the image of His Son. This illustrates the profound truth that God is actively working in the lives of believers to transform them into Christ’s likeness, ensuring their salvation and glorification. Hence, every believer can have confidence that their lives serve a greater purpose as laid out by God's plan.