God's WORDS are mighty WEAPONS with Divine Power to pull down enemy strongholds, including fear. Derek illustrates this through the Pirate Warfare of 2Corinthians 10:4-6, and the destruction of Joshua's Jericho through the WORD of FAITH, which was necessary for Israel to enter her Promised Land (likewise to enter our Promised Land we must pull down the strongholds that stand in the way). Jesus said, we can remove the mountains of enemy opposition to the will of God by declaring His WORD, and believing that what we say will come to pass, by the the power of God's Spirit released through our words (Mark 11:23, Zechariah 4:6-9).
Oxford Bible Church - Living in the Last Days (audio)