How do we know that God shows mercy according to His will?

God’s sovereignty in showing mercy is a profound theological truth found in Exodus 33:19, where He states, 'I will be gracious to whom I will be gracious, and I will show mercy on whom I will show mercy.' This proclamation underscores the idea that mercy is not something that can be earned or deserved; rather, it is at the discretion of God’s sovereign will. The Apostle Paul reinforces this in Romans 9, making it clear that God's mercy is not dependent on human effort or desire but on His mercy alone. Understanding this aspect of God's character leads us to a deeper appreciation of His grace and the assurance that our salvation is based entirely on His divine choice and unmerited favor.