How do we know that God's sovereignty is involved in salvation?

The sermon emphasizes God's sovereignty through the examples of God's dealings with Israel and the Gentiles. Jesus refers to Elijah and Elisha, noting that during times of great need, none of the widows in Israel were helped except for one in Sidon and none of the lepers in Israel were cleansed but Naaman, the Syrian (Luke 4:25-27). This illustrates that God's grace is not confined to human expectations or boundaries, but is freely bestowed according to His sovereign will. The idea is that God selectively applies His mercy, demonstrating His authority over who receives grace and salvation, aligning with the principles of sovereign grace theology.