How do we know that God can use anyone for His purpose?

The biblical narrative is filled with examples of God using unexpected individuals to accomplish His purposes. In the story of Naaman's healing from leprosy, it is a young Israelite maid who, despite her captivity, shows great faith and courage by advising Naaman's wife to consult the prophet Elisha. Her simple but profound faith leads to Naaman's healing and a recognition of the one true God. This illustrates that God’s sovereignty is not limited by circumstances; He can use the humble, the overlooked, and even the oppressed to achieve His grand designs. This aligns with the Reformed understanding that God operates according to His will and purpose, employing anyone He chooses, as exemplified in 1 Corinthians 1:27.