Satan is real and seeks to destroy people by waging war against them using spiritual forces of evil, though many think he is just symbolic. To withstand Satan's attacks, believers must be strong in God's strength by putting on the full armor of God, which is invisible to the physical eye but real in the spiritual realm and will determine how well one can deal with temptations from the devil. The document calls readers to confront any areas of their lives that have been left open to Satan's influence.