What does it mean for the word to be mixed with faith?

The phrase 'mixed with faith' in Hebrews 4:2 indicates that hearing God's word alone is insufficient; it must produce genuine faith within the believer. This mixing suggests an internalization of God's truth that leads to belief and an active trust in God’s promises. The Israelites heard the gospel preached, but their failure to mix it with faith resulted in their exclusion from the promised rest. This principle is echoed in the Reformed theology that emphasizes the necessity of divine grace in enabling individuals to respond positively to the gospel. Without the Holy Spirit's work, one cannot truly believe, thus demonstrating the importance of cooperative action between hearing and believing.