Do you realize that we, as Christians, are in a battle? It's a battle with the unseen demonic world. Paul said in Ephesians 6:11: "For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms" (NIV). Notice that he says our struggle is not physical but spiritual. It's "not against flesh and blood." Therefore, because of its nature, you must be Spirit-filled (Eph.5:18) and "strong in the Lord (Eph.6:10). The warfare that we're engaged in is not with the people in your home or at work - it's with the god of this world. And as you walk under the control of the indwelling Spirit you will sense that conflict on an even greater scale.
So as you live today in the fellowship of the Spirit, realize that this warfare is a "war of universal proportions pitting God and His truth against Satan and his lies. It’s a battle of wills between God and Satan. It’s a cosmic conflict that involves God and the highest creature He ever made and it filters down to every human being. Satan and his army of demons are fighting Christ, His holy angels, the nation of Israel, and believers. The battle lines are clearly drawn" (How to Meet the Enemy, John MacArthur).