How Can We Stand Firm Against the Devil With the Whole Armor of God?

How can Christians win the fight against wicked spirit forces? What are the pieces of spiritual armor? Why is it vital that we wear each piece? How much influence does Satan have? How does Satan try to influence you? Why is there no need to feel intimidated by Satan and the demons? How you can win the battle for the Christian mind. How you can put on the full armor of God?