Here are 5 Bible verses about being of the world from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
James 4:4 KJV
Ye adulterers and adulteresses, know ye not that the friendship of the world is enmity with God? whosoever therefore will be a friend of the world is the enemy of God.
2 Timothy 2:22 KJV
Flee also youthful lusts: but follow righteousness, faith, charity, peace, with them that call on the Lord out of a pure heart.
John 15:19 KJV
If ye were of the world, the world would love his own: but because ye are not of the world, but I have chosen you out of the world, therefore the world hateth you.
Philippians 2:21 KJV
For all seek their own, not the things which are Jesus Christ’s.
2 Timothy 4:10 KJV
For Demas hath forsaken me, having loved this present world, and is departed unto Thessalonica; Crescens to Galatia, Titus unto Dalmatia.
Psalms 88:18 KJV
Lover and friend hast thou put far from me, and mine acquaintance into darkness.
