When you are worldly

“Do not love the world or the things in the world. If anyone loves the world, the love of the Father is not in him. For all that is in the world—the desires of the flesh and the desires of the eyes and pride in possessions—is not from the Father but is from the world. And the world is passing away along with its desires, but whoever does the will of God abides forever.” (1 John 2:15-17 ESV)

Worldly people are devoid of the Spirit 

“It is these who cause divisions, worldly people, devoid of the Spirit.”  (Jude 1:19 ESV) 

Friendship with the world is enmity with God   

 “You adulterous people! Do you not know that friendship with the world is enmity with God? Therefore whoever wishes to be a friend of the world makes himself an enemy of God.” (James 4.4 ESV)

God chose you out of the world 

“If you were of the world, the world would love you as its own; but because you are not of the world, but I chose you out of the world, therefore the world hates you.” (John 15:19 ESV)

Renounce worldly passions 

“Training us to renounce ungodliness and worldly passions, and to live self-controlled, upright, and godly lives in the present age.” (Titus 2:12 ESV) 

Therefore…

“Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect.” (Rom. 12:2 ESV)

“Set your minds on things that are above, not on things that are on earth.” (Col. 3:2 ESV)

Quotes:

“Modern Christians hope to save the world by being like it, but it will never work. The Church's power over the worldsprings out of her unlikeness to it, never from her integration into it." – Tozer

“The Christian says, 'Creatures are not born with desires unless satisfaction for those desires exists. A baby feels hunger: well, there is such a thing as food. A duckling wants to swim: well, there is such a thing as water. Men feel sexual desire: well, there is such a thing as sex. If I find in myself a desire which no experience in this world can satisfy, the most probable explanation is that I was made for another world. If none of my earthly pleasures satisfy it, that does not prove that the universe is a fraud. Probably earthly pleasures were never meant to satisfy it, but only to arouse it, to suggest the real thing. If that is so, I must take care, on the one hand, never to despise, or to be unthankful for, these earthly blessings, and on the other, never to mistake them for the something else of which they are only a kind of copy, or echo, or mirage. I must keep alive in myself the desire for my true country, which I shall not find till after death; I must never let it get snowed under or turned aside; I must make it the main object of life to press on to that country and to help others to do the same.” - C.S. Lewis, Mere Christianity