At the cross, Satan and his unclean spirits were destroyed (Heb. 2:14). The word destroy is from the Greek katargeo, which means "to put out of action, to make useless." It is used repeatedly to show how through the death and the return of Christ (parousia), the powers of destruction that threaten man spiritually are put out of action. In First Corinthians 15:24, this includes all dominion of demonic authority and power. In verse 26, death itself will be the last enemy to be rendered useless. All these are "coming to nothing" (1 Cor. 2:6), including Satan himself and his demonic leaders (Heb. 2:14).
As a result of Calvary, the Resurrection, and the Ascension, Christ is enthroned. He is raised "far above all rule and authority, power and dominion ...And God placed all things under His feet..." (Eph. 1:21-22). These terms for heavenly beings may include both the holy angelic beings and the fallen ones, now the demons. Christ is seated at the right hand of God, far above all heavenly beings of whatever rank, and certainly above all fallen spirit beings of whatever rank. Potentially, these fallen beings are "under His feet," for they have already been defeated. But they are bluffing as if they were still undefeated, trying to assert their dominance over us.
These demonic beings know they are defeated and what their end will be; that is why they fear us and our prayer so much. They know we have authority from Jesus. But when you resist them in His name and power, they will not only back away, they will actually flee from you (Jas. 4:7).
In summary, Satan may roar like a raging lion, trying to frighten you, but he is a defeated usurper. He has no right, standing, authority, or legal place in your life.
a. He is being expelled, driven out by Jesus (John 12:31).
b. He is disrobed and disarmed and has been made a public spectacle as a defeated foe in Christ’s triumphal procession. Christ has displayed the disgraced Satan as His prime trophy, revealing to all beings in heaven and hell that Satan has lost (Col. 2:15). The counterfeit roaring lion has been defeated by the true Lion of the tribe of Judah, Jesus Christ, Son of Man, beloved Son of God (Rev. 5:5).
c. His power is destroyed, and he and all his forces are put out of action as far as any true power is concerned (Heb. 2:14; 1 Cor. 2:6; 1 Cor. 15:24).
d. He and all his demonic cohorts are put under Jesus’ feet potentially and will soon be put there absolutely (Eph. 1:21-22). In fact, he will be actually crushed (syntribo) beneath your feet also (Rom. 16:20). Syntribo means "to break to pieces by crushing" – a total, crushing defeat.
Thus, Jesus says to us, as He said to His disciples, "I have given you authority...to overcome all the power of the enemy; nothing will harm you" (Luke 10:19). Unworthy though we are, we should humbly but confidently accept this authority, acting upon Christ’s glorious victory at Calvary as we defeat and bind Satan’s power in His name.