David Wilkerson emphasizes the urgency of preaching the gospel as a testimony to all nations, highlighting that the end will come only after this has been accomplished. He critiques the current state of many churches in America, where the true gospel is often compromised, resulting in a lack of genuine witness to Christ's lordship. Wilkerson warns against relying solely on strategies and methods for church growth, asserting that true transformation comes from a deep, personal relationship with Jesus. He acknowledges that some churches are thriving under pastors who prioritize prayer and a deeper walk with God. Ultimately, he calls for a return to authentic testimony that reflects the reality of the gospel in believers' lives.