Enemies

"You adulteresses, do you not know that friendship with the world is hostility with God? Therefore whoever wishes to be a friend of the world makes himself an enemy of God" James 4:4

We need to make the things of the world our enemy. This may prove to be a difficult task.

God promises to help though.

"Submit therefore to God. Resist the devil and he will flee from you." James 4:7

Once again
"Do not love the world nor the things in the world. If anyone loves the world, the love of the Father is not in him." 1 John 2:15

Again and again and again it's found in scripture. I guess that's as clear as it gets.