You adulteresses, do you not know that friendship with the world is hostility toward God? Therefore whoever wishes to be a friend of the world makes himself an enemy of God.
John 15: 19
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.
2 Tim 2: 4
No soldier in active service entangles himself in the affairs of everyday life, so that he may please the one who enlisted him as a soldier.
1 John 2: 15 - 17
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. 16 For all that is in the world, the lust of the flesh and the lust of the eyes and the boastful pride of life, is not from the Father, but is from the world. 17 The world is passing away, and also its lusts; but the one who does the will of God lives forever.
2 Cor 6: 14 - 17
Do not be bound together with unbelievers; for what partnership have righteousness and lawlessness, or what fellowship has light with darkness? 15 Or what harmony has Christ with Belial, or what has a believer in common with an unbeliever? 16 Or what agreement has the temple of God with idols? For we are the temple of the living God; just as God said, "I will dwell in them and walk among them; and I will be their God, and they shall be My people. 17 Therefore, come out from their midst and be separate," says the Lord. "And do not touch what is unclean; and I will welcome you."
Eph 5: 11
Do not participate in the unfruitful deeds of darkness, but instead even expose them.
Romans 12: 2
And do not be conformed to this world, but be transformed by the renewing of your mind, so that you may prove what the will of God is, that which is good and acceptable and perfect.