C.H. Spurgeon addresses the challenges posed by modern thought to foundational Christian beliefs, presenting seven critical questions that probe the integrity of faith in Scripture, the deity of Christ, the nature of sin, and the work of the Holy Spirit. He emphasizes the necessity of clear, unwavering answers to these questions to combat the subtle errors that threaten the gospel. Spurgeon expresses concern over the reluctance of some to adhere to creeds, highlighting the importance of maintaining a firm stance on essential doctrines to preserve true fellowship among believers.