James 4:4 says, "Adulterers and adulteresses! Do you not know that friendship with the world is enmity with God? Whoever therefore wants to be a friend of the world makes himself an enemy of God."
As believers in Jesus Christ we must guard our selves from allowing the lust of the eyes the lust of the flesh and the pride of life (1 John 2:16) to get a hold of our hearts after we have become Christians. God help us not to have one foot in the world and one foot in church, God help us not to have divided hearts and be double minded (James 1:8).