David Ravenhill emphasizes the importance of understanding and applying prophetic words in our lives, using the example of Paul who, despite warnings of suffering, was determined to go to Jerusalem. He highlights that prophetic messages require interpretation, application, and faith to be effective, and warns against the dangers of unbelief that can hinder God's promises. Ravenhill also discusses the complexities of prophetic timing and the necessity of aligning our motivations with God's will. He encourages believers to actively engage with prophetic words, ensuring they are mixed with faith and appropriate action.