John 12:30-32 English Standard Version
Jesus answered, “This voice has come for your sake, not mine. Now is the judgment of this world; now will the ruler of this world be cast out. And I, when I am lifted up from the earth, will draw all people to myself.”
1 John 5:4 For everyone who has been born of God overcomes the world. And this is the victory that has overcome the world—our faith.
Ephesians 6:12 For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places.
We tend to forget that the enemy has already been defeated and in the heavenly realm it is finished. This happens to us because we live in time and the battle we fight is one of the Spirit over our flesh.
Romans 8:2-4 English Standard Version
For the law of the Spirit of life has set you free in Christ Jesus from the law of sin and death. For God has done what the law, weakened by the flesh, could not do. By sending his own Son in the likeness of sinful flesh and for sin, he condemned sin in the flesh, in order that the righteous requirement of the law might be fulfilled in us, who walk not according to the flesh but according to the Spirit.
That is a walk of faith.