F.B. Meyer emphasizes the necessity of decisive action against evil, using the example of Jehoiada's boldness in overthrowing Athaliah to restore righteousness in the nation. He argues that tolerating evil is not an option for believers, who are called to confront and eradicate sin in their lives and communities. Meyer encourages Christians to step out of their comfort zones and engage in the fight against societal issues like impurity and extravagance, reminding them that they are citizens of both the New Jerusalem and their earthly communities. The sermon calls for a collective response to the moral decay around them, urging believers to take a stand for God's cause.