The following is an excerpt from my book, The World Before A Watching Church (2011), taken from chapter 3: The Church In The World.
Just prior to the Lord Jesus’ death on the cross, He spoke these words to His disciples:
If you were of the world, the world would love its own; but because you are not of the world, but I chose you out of the world, because of this the world hates you (John 15:19).
Compare Our Lord’s words “you are not of the world” (restated in John 17:16) with His equally affirmative statement of John 17:11: “They themselves are in the world.” This is not a contradiction but a truth which every believer should fully comprehend. The underlying truth is not esoteric in its meaning, once the significance of the world is understood. Believers who are alive physically, live and reside in this world system which is under the control and evil influence of Satan (Ephesians 6:12). The fact that we are not of this world denotes that we now belong to God because of His regenerating work in us (1 Corinthians 6:19; Titus 3:5). When John states that “Whoever believes that Jesus is the Christ is born of God” (1 John 5:1), he is asserting that believers have a heavenly origin. And yet we are physically in this world because God has a plan for our lives that is ultimately to glorify Him.
There is certainly no denying the Biblical and historical evidences that the early 1st Century disciples of Jesus were under great testing from different segments of their culture. They were consistently at odds with the leadership of the Jewish religious system as well as the Roman government. However, when you look at the culture of the 21st Century, you see a very similar hatred for Christians who claim Jesus Christ as Savior, but for a very different reason. Christians are despised because the culture has a deep-seated guilt from their rejection of the Creator and the suppression of this truth (Romans 1:18-19). The unbeliever does not want to relinquish their self-supremacy. In doing so they believe that they are the final authority for their lives and that there is no God and there is no need for God. Since they are unable to physically strike out at the Creator, they unload their anger and hatred on the Christian. They cannot tolerate the ever-present reminder of their rebellion and seek every avenue which the culture offers to defeat, deter and decimate the truth of Christianity. But the unbelieving culture does not stand alone in this confrontation. Jesus tells us that Satan, the evil one (John 17:15), is a ruler of this world (John 14:30) who has been judged (John 16:11) and will be cast out (John 12:31).
Once we understand this principle that the new life we have in Christ is not of this world, we must then separate ourselves from the evil influences of this world system. This does not mean that we become monastic in the practice of our faith. It simply means that as we become more aware of the distractions of this world, we should then become more responsive to how God wants us to live, based upon His Word.
On this point Dr. Chafer writes:
This cosmos system is largely characterized by its ideals and entertainments and these become allurements to the Christian…These features of the cosmos are often close counterfeits of the things of God and in no place does the believer need divine guidance more than when attempting to draw the line of separation between the things of God and the things of Satan’s cosmos.[1]
To comprehend that our present-day culture is under the evil, controlling influence of Satan is to fully appreciate the precarious position in which we Christians live today and our need for Biblical direction.