What does it mean that God chooses whom to show mercy?

The doctrine of God's sovereign grace asserts that He chooses whom to show mercy to based on His will and purpose, not on any foreseen merit from us. Romans 9:15 highlights this by reminding us that God said, 'I will have mercy on whom I will have mercy,' emphasizing that the act of receiving mercy is completely dependent on God's initiative. This doctrine assures us that our salvation is not rooted in our efforts or worthiness but is an outflow of God's grace alone. As believers, understanding this concept not only brings comfort but also encourages us to engage in a life of gratitude and reverence towards the One who chose to save us despite our unworthiness.