The sermon establishes that humanity can only know God through His divine speech, which is preserved in the Holy Scripture. It explains that the biblical canon was not created by church councils but recognized by believers based on apostolic authority and historical authenticity. The speaker details how Jewish scribes meticulously preserved the Old Testament and how early Christians identified New Testament writings through their connection to the apostles. The presentation refutes the inclusion of the Apocrypha by demonstrating its lack of prophetic claim and historical reliability. Ultimately, the message affirms that God has faithfully preserved His Word, providing a trustworthy foundation for faith and knowledge of Him.