You can be a believer, saved, but if you’re not careful, the devil can still oppress or oppose you from the outside by creating structures and systems to put a stop to your progress as he cannot reside inside of you with the presence of the Holy Ghost in you. Matthew 2: 1-8, Matthew 21:16. The devil uses men by putting systems and structures to stop a believer. As believers, with prayers, we break forth. Acts 2:23, Matthew 27:60, 62-66. Acts 2:24, Ephesians 1:17-21.