Bertha Smith emphasizes the significance of dedication to God through the sacrificial system, illustrating how the priests had to offer perfect sacrifices, such as a bullock and sheep, to atone for their sins and represent their complete dedication to the Lord. She explains that true dedication can only come from those who have been cleansed and have died to their sinful nature, allowing them to fully commit themselves to God. The sermon highlights the importance of understanding the cost of sin and the necessity of Christ's sacrifice for true forgiveness and relationship with God. Smith urges believers to recognize their role as priests, standing between God and the world, and to live in a way that reflects God's holiness. Ultimately, she calls for a deeper understanding of God's holiness and the seriousness of sin in the lives of believers.