John Wesley explores the concept of enthusiasm in the context of true Christianity, contrasting it with a superficial form of religion that lacks heartfelt devotion. He emphasizes that those who genuinely pursue a relationship with God may be labeled as 'mad' by the world, as their focus on eternal matters often leads to a disregard for temporal concerns. Wesley warns against various forms of enthusiasm, including self-deception about one's spiritual state and the mistaken belief in possessing divine gifts that one does not have. He encourages believers to seek a genuine understanding of God's will through scripture and reason, rather than relying on subjective experiences or impressions. Ultimately, Wesley calls for a balanced approach to faith that avoids the pitfalls of both enthusiasm and nominal Christianity.