According to the Catechism, "The whole of man's history has been the story of dour combat with the powers of evil, stretching, so our Lord tells us, from the very dawn of history until the last day. This dramatic situation of hte whole world, which is in the power of the evil one, makes man's life a battle."
Therefore beloved, "Put on the whole armor of God, so that you may be albe to stand against the wiles of the devil. For our struggle is not against enemies of blood adn flesh, but against the rulers, against the authorities, against the cosmic powers of this present darkness, agains the spiritual forces of evil in the heavenly places."
This book contains prayers to help us remember God's presence and victory over all evil.