So what is spiritual warfare? Simply put, it's preaching the truth from scripture. Paul wrote in 2 Corinthians 10:4 (KJV), "(For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds;"
The context of this chapter shows plainly that we battle lies and faulty human reasoning with God's Word. It isn't done by binding and rebuking Satan. Matthew 18:18 clearly is in the context of church discipline, not, as charismatics claim, sending demons to the abyss. They preach utter nonsense and are deluded into thinking they're serving Christ.
And as Paul admonished in 2 Timothy 2:15 (KJV), "Study to show thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth."
The sixth chapter of Ephesians lists the spiritual Armour which we must wear at all times. Each part is needed for the destruction of Satan's lies, one of those being that demon-chasing doctrine. As C. S. Lewis noted in his book, The Screwtape Letters, people have two equal and opposite errors about demons. Either they don't believe there are any or they're obsessed by them to the point where they aren't preaching the gospel.
I need to write my book called You Think You're Going to Heaven? Satan has millions of lies, all designed to pull people off the narrow way. My intent and mission is to pull people onto that straight way.
Stay tuned for more excellent Bible teaching. I have many more errors to comment on next month.