Satan has been defeated by the cross, he can't do anything to me...  Right?

Let's say the Ravens are coming to town next week to play the Browns.  And let's say the Ravens were just defeated by the Colts.  So we can say; The Ravens are a defeated foe.  They've been defeated by the Colts, they can't do anything to us.  Ugh, yeah, the Colts defeated the Ravens, but have the Browns defeated the Ravens?

Many people think that the devil is not a problem today because Jesus defeated him.  Yes, Jesus defeated the devil and made a spectacle of him, but that doesn't mean the devil isn't still active here on planet earth.  When Jesus defeated the devil, what he did was to make it possible for you to now defeat the devil as well!  Because many people don't understand this they don't bother to learn about the spiritual realm and how to do battle against the devil and his army.

As soon as you start to teach on the spiritual realm and how to defeat the tactics of the devil, some religious person almost always perks up and says, "You're just glorifying the devil by teaching on him."  No, I'm not glorifying the devil by teaching about him and the spiritual realm.  I'm informing people how to be victorious over the devil's attacks.  The more you know about your enemy and his tactics, and the weapons that you have available and how to use them, the better chance you stand to defeat him. 

If the Ravens are coming to town do you think the Brown's coaches say, well, we're not going to study any game film or tactics of the Ravens because we don't want to glorify them?  How ridiculous! 

Here are some scriptures.  After reading these can you really say that the devil is not something that we need to be concerned about?  That he's not something that we need to learn how to resist?  That we really don't need to learn how to do war against him and his angels?

1 Peter 5:8-9 NIV
8 Be self-controlled and alert. Your enemy the devil prowls around like a roaring lion looking for someone to devour. 9 Resist him, standing firm in the faith...

James 4:7 NIV
7 Submit yourselves, then, to God. Resist the devil , and he will flee from you

Eph 2:1-2 NIV
2:1 As for you, you were dead in your transgressions and sins, 2 in which you used to live when you followed the ways of this world and of the ruler of the kingdom of the air, the spirit who is now at work in those who are disobedient.

1 John 5:19 NIV
19 We know that we are children of God, and that the whole world is under the control of the evil one.

Eph 4:26-27 NIV
26 "In your anger do not sin": Do not let the sun go down while you are still angry, 27 and do not give the devil a foothold.

2 Cor 2:10-11 NIV
10 If you forgive anyone, I also forgive him. And what I have forgiven-if there was anything to forgive-I have forgiven in the sight of Christ for your sake, 11 in order that Satan might not outwit us. For we are not unaware of his schemes.

From what I can see, there needs to be a lot more teaching on the tactics of Satan's kingdom and how to use the authority that Jesus gave us to defeat him.

Jesus defeated the devil, stripped him of his authority, making it possible for you to defeat him as well.  Now, have you defeated the devil lately?