This class explores the biblical definition of foolishness as the active rejection of God and His revealed truth, contrasting it with wisdom which is the application of God's knowledge. By examining passages from Romans, Matthew, Psalms, and Proverbs, the text establishes that foolishness manifests in denying God's existence, trusting in self-reliance, and ignoring divine correction. The preacher clarifies that while believers are wise in Christ, they can still act foolishly by disobeying His commands or living as if God does not exist. Key characteristics of a fool include arrogance, credulity, and a refusal to submit to Scripture's authority. Ultimately, the message calls for self-examination and reliance on Christ to overcome folly and pursue true wisdom.