A.W. Tozer emphasizes the necessity of maintaining a devotional life for success in the Christian journey, which involves a constant awareness of God's presence and engaging in inward conversations with Christ. He explains that to cultivate this devotional mood, believers must abide in Christ, walk in the Spirit, and meditate on God's Word while also separating themselves from worldly distractions. Tozer warns that true holiness and spiritual power require ongoing effort and cannot be treated as a one-time achievement. He highlights the importance of obedience to God's will and the challenges posed by the world, the flesh, and the devil in our spiritual growth.

Too many of us object, perhaps unconsciously, to the rather evident fact that the maintenance of the devotional mood is indispensable to success in the Christian life. And what is the devotional mood? It is nothing else than constant awareness of God's enfolding presence, the holding of inward conversations with Christ and private worship of God in spirit and in truth! To establish our hearts in the devotional mood we must abide in Christ, walk in the Spirit, pray without ceasing and meditate in the Word of God day and night. Of course this implies separation from the world and obedience to the will of God, as we are able to understand it. No matter how we may argue, true holiness and spiritual power are not qualities that can be once received and thereafter forgotten, as one might wind a clock or take a vitamin pill. Every advance in the spiritual life must be made against the determined resistance of the world, the flesh and the devil!