A.W. Tozer emphasizes the significance of our thoughts in shaping our spiritual condition, urging believers to examine their voluntary thoughts to understand their true selves. He illustrates the importance of surrendering our minds to God, allowing the Holy Spirit to guide our thoughts towards holiness. Tozer encourages the practice of mental prayer as a means to cultivate a habit of holy thought, suggesting that consistent communication with God can transform our thinking. He highlights the struggle many face with their thought life and calls for divine intervention to help develop a mindset aligned with God's will.