The sermon examines 1 John 2:15-17 to warn believers against loving the world, defined as the desires of the flesh, the eyes, and the pride of life. It argues that loving God and loving the world are mutually exclusive and lead to opposite eternal outcomes: passing away or abiding forever. The preacher explains that the only effective way to resist worldly affection is through the expulsive power of a new, superior love for the Father revealed in the gospel. By focusing on Christ's sacrificial love and remembering Christian privileges like forgiveness and victory over evil, believers can cultivate a heart oriented toward God rather than temporary worldly values.