For we are not unaware of [Satan’s] schemes.
Whether we like it or not, we in Jesus are in a spiritual battle. And the more serious we are about our walk in the Lord, the more real that warfare will become.
Yes, Satan and his hosts are defeated through the risen Christ’s death (Colossians 2:15). We in Christ have the victory, and can live in that by faith. But living within that is not automatic.
Everyone who believes that Jesus is the Christ is born of God,and everyone who loves the father loves his child as well. This is how we know that we love the children of God: by loving God and carrying out his commands. In fact, this is love for God: to keep his commands. And his commands are not burdensome, for everyone born of God overcomes the world. This is the victory that has overcome the world, even our faith. Who is it that overcomes the world? Only the one who believes that Jesus is the Son of God.
The world, the flesh, and the devil have aptly been called the unholy trinity, not that such is actually analgous with the Blessed Trinity, but because in scripture these three though distinct, are in sync with each other. The world refers to the world system set against God either subtely, or not so subtely. The flesh refers to humankind under the power of sin, manifest individually and systemically. And the devil is Satan, or evil personified, actually in a person which in their evil loses what is good of personhood, and disguises evil as good.
We in Christ by the Spirit and in the communion of the church need discernment from God to understand the enemy’s working, what they’re up to, and how they trip us up. There is no question that they do. And we need to be not only aware of that, but to learn to recognize it when it is happening, and know what to do to resist and overcome it. And we have to remember that in this present life this spiritual warfare will continue on (Ephesians 6:10-18) until the Lord returns.*
To be aware of this we might well say is half the battle, but we need to know what to do, as well. We certainly need to resist and stand firm, holding on to the gospel as the power of God to overcome sin, death, and evil. While seeking to remain responsible, our final hope and confidence lies only in the good news of God who is Jesus, with all the meaning that comes with that in God’s revelation found in scripture and taught by the church. There is no easy formula. It involves our entire life, and all of God’s revelation to us in Jesus, received not only once, but over and over again. Through a once for all salvation, which involves a process in growth in grace into increasing conformity to God’s will in Jesus. So that even though we through Jesus can do better and overcome some things, we must be ready for more. Hopefully getting better and better at it, as we look forward to our Lord’s return when evil will be vanquised forever and this spiritual warfare done.
*See C. S. Lewis’s, The Screwtape Letters for a most interesting, informative look at this, told in an imaginative, true to life story.