But may it never be that I would boast, except in the cross of our Lord Jesus Christ, through which the world has been crucified to me, and I to the world.
Galatians 6:14 NASB
The cross of Christ is a barrier between the believer and the world. By it, the disciple has died to this world; he has forsaken it for the kingdom of God. And by the cross, this world has lost its attraction for the child of God. His mind is set upon heavenly things, and his life is hidden with Christ in God (Col 3:1-3).
In scripture we are warned that to have friendship with the world is to be an enemy of God (James 4:4). Those who love the world cannot love God (1 John 2:15-17). Even though we see such plain warnings in the world of God, we often tend to overlook them. We speak of "worldly" Christians, but the plain teaching of scripture is that we as Christians are to come out of the world and be separate from it. In reality there is no such thing as a worldly Christian, for the Christian is not of this world according to Jesus Christ (John 15:19, 17:14-16).
Once again, the answer is found in the cross of Christ. This is the means by which we die to the world and all of its attractions. The Apostle Paul states that He is "Crucified with Christ" (Gal 2:20). Dead men have no plans or agendas. A man on the cross could do nothing. His life was over. He had no more purpose in this world but to die. Likewise, as we come to the cross in total surrender to the claims and Lordship of Jesus Christ, we lay down absolutely everything. all of our hopes and dreams, plans and purposes, all we hold dear, we forsake it all, and pick up the cross by which we must die (Mark 9:34-34).
This is the standard for all who profess to follow Christ,
Now those who belong to Christ Jesus have crucified the flesh with its passions and desires.
Galatians 5:24 NASB