In this sermon, the speaker addresses the issue of Christians becoming too isolated from the world. He emphasizes the importance of being separated from the world but not isolated, and highlights the danger of being too involved in the Christian subculture. The speaker also discusses the imbalance between the words and the music of the Gospel, pointing out the lack of evangelism in churches and the low number of people involved in full-time Christian work. He shares a personal experience that revolutionized his thinking on evangelism, allowing him to freely share small references to the Lord without feeling the need to overwhelm people with a full presentation. The sermon concludes with a discussion on a Bible verse and its relevance to lifestyle evangelism.