Hector,
I'm going to make a few comments because overall this premise of Satan and demons being 'defeated' as in past tense is not scriptural.
The apparent defeat and conflict of the believer is with the devil, is due to the ignorance of not knowing the position that he has in Christ, and of the victory of Christ on the cross.
One of the best-known doctrines in the Evangelical religious system is the devil and the demons, they terrorize and manipulate believers, leading them to religious slavery and constant fear. Let's look at the Bible regarding both demons and the devil .
I. before Christ.
A.-<job.1:6-12>Satan accused the sons of God before the Lord.
that was his task, but it could not touch them, unless God allowed. His power was limited.
Satan's job has not changed before or after Christ's earthly ministry. God does not 'allow' things to happen, but instead, causes & brings about all things to fulfill His intentions. See the excerpt from LOF #15-C called 'Can You Handled the Truth' (
http://bible-truths.com/lake15-C.html).
Satan has always been limited to only that which God declares he can do.
B-<ef.2:2>we were still under that evil power when we were in the world, but we are now in Christ.
We were a while under the influence of evil, for not knowing the freedom that we had been given</ef.2:2></job.1:6-12>
As you keep reading in Ephesians chapter 2, Paul informs the church that it is by the 'grace of God' that we 'walk in the good works which God has prepared'. We were under the influence of the wicked one because he was sent out to deceive the whole world [Rev 12:9]. One doesn't know they are free until their eyes are opened to that truth.
II after Christ, we know that.:
A.-<col.2:14,15>stripped the principalities and powers, triumphing over them in the cross.
The cross was not a show, but a place of victory, victory for Christ and defeat for the devil and his demons.
Principalities & powers are not always referring to spiritual powers or demons. The Chief Priests, Scribes & Pharisees were considered to be 'rulers of the people' of the synagogue and Judaism. Pontius Pilate & King Herod also were rulers of their respective territories...though as Christ stated, 'Thou couldest have no power at all against me, except it were given thee from above' [John 19:11].
B.-<heb.2:14>. Destroyed the Empire of death that is the devil.
If He (Jesus) destroyed the devil, then he doesn't exist, if he is not destroyed, then Christ failed on the cross. Before He went to the Cross He said: the Prince will be thrown out, and that happened when he went to the cross. <Jn.12:31,32>
Again, this goes back to the fact that this is not a past tense event. From the Concordant:
Heb 2:14 ...He should be discarding him who has the might of death, that is, the AdversarySatan does still exist, seeing that Jesus himself prophesied of his coming imprisonment and ultimately, spiritual conversion [Rev 20:1-3, 7-10]. This does not make Christ a failure but rather speaks of a coming event of Satan being cast down.
C-<apoc.12:10>the accuser was cast down outside.
Christ established his Kingdom, and cast out the devil, out of his Kingdom, in Christ Kingdom the devil does not operate.
Christ RETURNS to establish His Kingdom [1 Cor 1:7, 15:23, 1 Thess 4:15-16], Satan is the god of this present wicked age [2 Cor 4:4, Gal 1:4].
(D)-<jud.6. ii="" pet.2:4="">demons were locked in eternal darkness, prisons.
they were locked, not flying around, upsetting persons, possessing them. </jud.6.></rev.12:10></jn.12:31></heb.2:14></col.2:14,15>
Jude 1:6 is not speaking of spiritual beings but people who 'in like manner to Sodom & Gemorrah' [verse 7] reaped to their own flesh. 2 Pet 2:4 speaks of human messengers (angels), who like the false prophets spoken of in verse 1, have reserved for themselves judgment in the last day [verse 9].
If Satan and his demons had been 'destroyed/cast out', then Paul would have no need to inform us of these spiritual principalities that we wrestle with [Eph 6:12] nor would James admonish us to submit to the Lord in order that the 'Devil will flee from us' [Jam 4:7].
There is coming a time when not only will Satan & his minions be cast out of their positions, but even better, will be spiritually converted. No one is too far to reach from the Arm of the Lord which brings salvation:
Ex 6:6 I am the LORD, and I will bring you out from under the burdens of the Egyptians, and I will rid you out of their bondage, and I will redeem you with a stretched out arm, and with great judgments
Isa 52:10 The LORD hath made bare his holy arm in the eyes of all the nations; and all the ends of the earth shall see the salvation of our GodHope this helps,
Marques