For he will command his angels concerning you to guard you in all your ways; they will lift you up in their hands, so that you will not strike your foot against a stone (Psalm 91:11,12). In the Bible these words are spoken by two opposing powers—God and Satan. The way they use these words points to a conflict. God uses them to give us comfort. Satan used them to tempt Jesus to sin. In this course we will consider not only the leaders but also the soldiers in these opposing armies: angels and demons. May this course lead us to a deeper appreciation not only of the angels but also of the gracious God who made and rules them! For further understanding consider reading the companion volume, John Schuetze’s Angels and Demons: Have Wings—Will Travel from Northwestern Publishing House.