John Chrysostom preaches about the eternal consequences of our actions, emphasizing the importance of building our lives on the foundation of Christ with valuable materials like gold, silver, and precious stones, rather than worthless materials like wood, hay, and stubble. He delves into the topic of whether hell fire has an end, citing biblical references to highlight the severity of eternal punishment for those who reject God's mercy and continue in sin. Chrysostom challenges his listeners to consider the justice of God's punishment, pointing out that even one sin can have grave consequences, and he urges them to repent and turn away from wickedness to avoid eternal suffering.