Erlo Stegen emphasizes the significance of Jesus as the Passover Lamb, drawing parallels between the Old Testament Passover and Christ's sacrifice. He highlights the importance of the blood of Jesus, which opens the way to God, contrasting it with the hardness of heart shown by the Jews who resisted God's work. Stegen warns against taking God's promises lightly, using Judas as an example of lost opportunity due to greed. He reminds believers to examine themselves and remove the old leaven from their lives, symbolizing the need for spiritual renewal. The sermon culminates in the celebration of Jesus' resurrection, affirming His identity as the Son of God and the giver of new life.