What does the Bible say about free will in serving God?

In Scripture, particularly in Joshua 24:15, the choice to serve the Lord is presented. However, a careful theological interpretation reveals that such choices are only meaningful when viewed through the lens of God’s sovereign will. The idea of free will in relation to salvation often elevates man's choice over God's sovereignty, which contradicts the core of Reformed theology. Man, in his natural state, does not possess the ability to choose God independently; instead, he is in bondage to sin and cannot serve God unless first made willing by His grace.