God's Word and His voice cannot be separated. God's voice, the work of the Holy Spirit, and the Biblical message all find unity in one voice. The Teacher's Commentary says "It is clear that God’s voice is heard in the flow of the Bible message. But that flow is not itself God’s voice. God’s voice speaks to us through the understanding we gain from grasping what the Scriptures teach." The Holy Spirit brings the understanding of God's Word and works to apply it to each one personally.
If we seek to hear and obey God voice the Holy Spirit will bring understanding and transformation to our lives. God will be faithful to His Word.
1. Richards, L., & Richards, L. O. (1987). The teacher’s commentary (997). Wheaton, IL: Victor Books.