"The fallen angels are those purely spiritual beings who, after being created by God and endowed with grace, failed to respond to God's love and turned away from Him" (Stravinkas. et al. 305). Fallen angels, also known as demons, follow Lucifer, the fallen Archangel and God's main adversary. Our Sunday Visitors Catholic Encyclopedia states that "although they [fallen angels] have lost supernatural grace, the fallen angels retain the power of purely spiritual beings. They deploy these powers in a variety of ways [such as possession] to obstruct the fulfillment of God's plan and to block the progress of human beings toward bliss. They do this not simply by tempting people to sin, but chiefly by foresting despair and unrepentance in sinners who otherwise might turn with confidence to the sure mercy of God" (Stravinkas. et al. 305). While a single demon may be very powerful and dangerous it is even more threatening when demons travel in groups, also known as gangs. In order for a priest to rid of these gangs, he must be able to call them by name, which can, as you may assume, take a long time (Burke).