Father mentions St. Teresa's comparison of demons to flies and follows this analogy with a series of spiritual flyswatters, or ways to get rid of the devil and his influence. The whole world is in the power of the evil one, but there is hope. We should be cautious but not scared. There are many prayers that can fend off the devil, including the Sign of the Cross, binding prayers, the Precious Blood prayer, St. Anthony's Brief, the recitation of the holy rosary and others. Sacramentals that are most powerful against the devil include: the scapular, the miraculous medal, blessed palm crosses, blessed salt, blessed oil, holy water, blessed rosaries and others.