This part stood out to me..
James 4:4 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.
4:4 -
James shows the seriousness of these believers' selfish, pleasure-oriented lives by identifying them as
adulteresses. With their Jewish background they would have quickly understood the significance of what James was writing.
In the Old Testament, Israel is pictured as the wife of Jehovah. Any involvement with other gods is viewed as spiritual adultery (
cf. Isa. 54:5;Ezek. 16:6-29; 23:1-49; Hos. 9:1).
In the New Testament, the Church is often depicted as the Bride of Christ (
cf. Eph. 5:22-32; 2 Cor. 11:2,3). James is concerned that his readers have not considered the seriousness of their sin.
do you not know - The problem is not a lack of knowledge but a failure to live according to the knowledge they have.
friendship with the world - They have entered into a relationship with the world that makes them unfaithful to God.
friendship (
philos) - This is the word for "love," and means
beloved, dear, loving, kindly disposed, devoted, and then is used for
friend. These believers have developed a relationship of love and affection with the world.
world (
kosnos) - "World" stands for the world-system in its alienation and hostility to God (
cf. 1 John 2:15-17; 5:19).
hostility (
echthra) - This person has set himself in opposition to God (
cf. Rom. 8:5-8 [esp. v. 7]).
The person who chooses to enter into a relationship of love and affection with the world
makes himself an enemy of God.
wishes to be (
boulethe) - It is a deliberate choice (ingressive aorist) made by the individual to become involved with the world.
makes himself (
kathistatai) - By the decision to be the friend of the world, this person has made himself the enemy of God.
enemy (
echthros) - This word is related to the earlier word
hostility (
echthra)
The context makes clear what is involved in worldliness or being a friend of the world. The basic issue is a life that centers on self. A selfish determination to satisfy my desires and cravings, to have things my way, identifies me as a friend of the world. We should note that this involves a deliberate choice (
wishes to be) to become involved with the world. A person decides that, rather than submit himself to God and His Word, he is going to do what he wants; he is going to have it his way.
I found this here
http://www.biblebb.com/files/GR774.HTM
What stood out to me.. is that selfishness, looking to self needs is actually adultery!! And as you share in verse 5 goes on to be idolatary..
Therefore friend of the world doesn't just mean going out and living as the world does.. but actually it is a deliberate choice to self serve.. which is very anti God!!