A.W. Tozer emphasizes the universal and conditional nature of God's invitation to salvation, as expressed in Revelation 22:16-17. He explains that while the call is open to 'whosoever will,' it requires a specific choice to accept the Living Water offered by Christ. Tozer stresses that true religion lies in the will, and a person's destiny hinges on their decision to follow Christ, which must be exclusive and final. He encourages believers to recognize that their relationship with God is not based on feelings but on a deliberate act of the will to obey and love Him. Ultimately, Tozer challenges listeners to make a definitive commitment to Christ, highlighting the transformative power of such a decision.