As humans, we are made up of our body, soul, and spirit—they are all equal components that make up who we are (1 Thessalonians 5:23; 3 John 1:2; Psalm 16:9). It is important for us to tend to our spirits, just as we do our bodies and souls. When we are saved, we are filled with the Holy Spirit and our human spirits are born again (John 3:1–8; Ephesians 1:13–14; 1 Corinthians 6:19). It is the Holy Spirit who makes us into a new spiritual creation (2 Corinthians 5:17). Because of this and because the spirit world is just as real as the physical world, Christians are supposed to be interested in—but not obsessed with—the spirit world.
Yes, the spirit world is real, but our focus should be on glorifying and inviting the Holy Spirit in our lives rather than paying too much attention to demonic powers. Overemphasis on the powers of darkness is unhealthy and useless for our walk with God. Only God has total power and dominion in the spirit world, and through Him we can overcome any attack that Satan sends our way (1 Peter 5:11; Isaiah 54:17). We were once in darkness, so why would we look back into the darkness? "For at one time you were darkness, but now you are light in the Lord. Walk as children of light (for the fruit of light is found in all that is good and right and true), and try to discern what is pleasing to the Lord. Take no part in the unfruitful works of darkness, but instead expose them" (Ephesians 5:8–11). We thank God for bringing us into His marvelous light and empowering us to live in step with the Holy Spirit.
We are called to put on the armor of God and to live in the Spirit: "Finally, be strong in the Lord and in the strength of his might. Put on the whole armor of God, that you may be able to stand against the schemes of the devil" (Ephesians 6:10–11). As the Bible tells us, "the weapons of our warfare are not of the flesh but have divine power to destroy strongholds" (2 Corinthians 10:4). Knowing and recalling God’s Word, focusing on what is true about God and reality, setting our minds on the things of the Spirit, we can have the right focus. We are assured that "greater is he who is in you than he who is in the world" (1 John 4:4), so as we abide in Him and set our mind and heart on Him, we experience life and peace (Romans 8:6) and can see life with the right perspective. Our focus must remain on Christ, the author and perfecter of our faith, who has already overcome the world (Hebrews 12:2; John 16:33). In doing so, we can live in this world with great purpose and confidently in Christ, understanding that there is more than we can see.