John Wesley addresses the issue of attending church services despite the presence of unholy ministers, emphasizing that the corruption of clergy has been a longstanding issue throughout church history. He argues that the grace of God can still be conveyed through the sacraments administered by unholy men, as seen in biblical examples, and that separating from the church due to the unholiness of ministers would lead to chaos and division among believers. Wesley encourages Christians to focus on promoting holiness and to remain engaged in the church, regardless of the character of its leaders, as the efficacy of God's ordinances is not dependent on the minister's personal holiness.