How do we know God saves whom He will?

The narrative of Jonah underscores God's sovereign choice to extend grace, as He sends His prophet to proclaim salvation to Nineveh, a wicked and undeserving city. In Jonah 4:10-11, God asks Jonah if He should not spare Nineveh, highlighting the principle that salvation belongs to the Lord. This aligns with Romans 9:15, where Paul declares that God will have mercy on whom He will have mercy. Thus, this doctrine assures us that our salvation is not based on merit but solely on God's sovereign will and purpose.