R.A. Torrey addresses the challenge of engaging with those who are deluded in their faith, particularly focusing on Roman Catholics, Jews, Spiritualists, Christian Scientists, and followers of false prophets. He emphasizes the importance of guiding them to understand the assurance of salvation, the necessity of the new birth, and the singular role of Jesus Christ as the mediator. Torrey encourages believers to use Scripture effectively to reveal the truth and to awaken a sense of need for Christ without attacking their current beliefs. He concludes that many deluded individuals are seeking something deeper and can be led to a genuine faith in Christ through patience and the truth of the Gospel.