Zac Poonen emphasizes the importance of understanding the role of Satan in God's creation, explaining that while Satan is the source of evil, his existence serves a divine purpose. God allows Satan to tempt humanity to foster free will and to encourage people to turn to Him in times of trouble. Poonen illustrates that suffering and challenges can lead to spiritual growth and a deeper relationship with God, as seen in the story of Job. He reassures believers that God maintains control over Satan's actions, using them for the ultimate good of His children. The sermon encourages listeners to recognize the significance of their choices and the transformative power of obedience to God.