Jesus promises that signs will follow those who believe, including the power to cast out demons in His name. This verse speaks to the authority believers have through their relationship with Christ. The power of the Holy Spirit equips us to overcome spiritual darkness and walk in victory. When we trust in God's power, we are empowered to bring light into dark places. This verse challenges us to step out in faith and to walk confidently in the authority that God has given us. It is not through our own strength, but through His Spirit, that we are able to cast out evil and proclaim the good news. As believers, we must remember that the same power that raised Jesus from the dead is available to us today, giving us the strength to face every spiritual battle.