In Genesis 3:15, God foreshadows His coming. He also tells Satan that He is giving man dominion over evil. Jesus, during His ministry, numerous times tells us that we have authority over Satan. I encourage you to read a few of these verses: Luke 10:19, John 4:16, John 16:7 and Mark 1:8. God also tells us that He dwells in us as a helper: 2 Corinthians 13:5, Romans 8:10, Galatians 1:15-16 and Colossians 1:27. We also have the Holy Spirit empowering us: Acts 5:32, 2 Corinthians 5:5 and Galatians 3:5.
I encourage all believers to think about and claim the power and authority in us based on these scriptures. I also want to encourage us all to remember the most important aspect of this life on earth, summed up in John 3:16, God Loves You!