How do we know God's choice to save is based on His election?

In Romans 11:2-5, Paul speaks of God's choice, emphasizing that He has reserved a remnant for Himself according to the 'election of grace.' This doctrine asserts that God, in His sovereignty, has chosen certain individuals for salvation, independent of their actions or decisions. It underscores that salvation begins with God's initiative, not human will. Acts 13:48 also reinforces this by declaring that those who were appointed to eternal life believed, thus showing the divine appointment of grace. Recognizing God's sovereign choice encourages humility and dependence on His mercy.