Charles Finney emphasizes the critical importance of governing the tongue as a reflection of true religion, arguing that a tongue not bridled by love and benevolence renders one's faith vain. He outlines the rules and conditions necessary for controlling speech, asserting that a heart filled with perfect love and entire consecration to God is essential for benevolent communication. Finney warns that without the governance of the tongue, true religion cannot exist, as idle words and selfish intentions contradict the law of love. He calls for moral courage to speak and remain silent appropriately, highlighting the need for self-examination in our speech. Ultimately, he urges believers to surrender their tongues to Christ for true sanctification and effective witness.