Reference: Covetousness
Easton
a strong desire after the possession of worldly things (Col 3:5; Eph 5:5; Heb 13:5; 1Ti 6:9-10; Mt 6:20). It assumes sometimes the more aggravated form of avarice, which is the mark of cold-hearted worldliness.
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But [rather] store up your valuables in heaven [i.e., by investing your life in spiritual things], where neither moths can eat nor rust corrode, nor burglars break in and steal,
For you [should] know this for certain: No sexually immoral or [morally] impure person, or greedy person, who is [the same as] an idol worshiper, has any inheritance in the kingdom of Christ and God.
So, put to death [i.e., stop practicing the desires of] your physical bodies [such as] sexual immorality, [moral] impurity, lust, evil desires and greed, which is [in reality] idolatry.
Keep your lives free from the love of money [and be] content with what you have, because God [Himself] has said [Deut. 31:6], "By no means will I [ever] desert you or give up on you."
Hastings
In the Bible, covetousness is a crime. In the Ten Commandments it is put under the ban along with murder, adultery, theft, and slander (Ex 20:17; De 5:21). Achan was guilty of this crime, and was stoned to death (Jos 7:16-26). Every occurrence of the word or the thing in the OT is connected with a prohibition or a curse (Ps 10:3; 119:36; Pr 21:26; 28:16; Isa 57:17; Hab 2:9). In the NT adultery and covetousness are usually classed together (1Co 5:11; 6:9-10; Col 3:5; 2Pe 2:14). This conjunction of sensual sin and love of money probably rests upon the authority of Jesus (Mr 7:21-22). Jesus and the Apostles declared that the worshipper of Bacchus and the worshipper of Venus and the worshipper of Mammon belong to one and the same class. Grasping avarice is as incompatible with the spirit of self-sacrifice taught in the NT as is the selfish indulgence in drink or the grosser indulgence in vice. The Bible puts the covetous man in the same category with the murderer and the thief. The Christian Church needs to study anew the Bible teaching concerning covetousness, as found in Jer 22:17; Mic 2:2; Lu 12:15; Ro 7:7; Eph 5:3,6; 1Ti 6:10; Heb 13:5, and other passages. No covetous man has any inheritance in the Kingdom of God.
D. A. Hayes.
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For from within, out of people's hearts, proceed evil thoughts, sexual immorality, stealing, murder, extramarital affairs, greedy desires, wickedness, deceit, unrestrained indecency, envy, slander, arrogance and foolishness.
And [then] He said to them, "Be careful and guard yourselves against [practicing] all forms of greed, for a person's life does not consist of having a lot of possessions."
What shall we say then? Is the law of Moses sinful? Certainly not! For I would not have known what sin was if it had not been for the law. For [example]; I would not have known [what it meant] to covet [i.e., have a strong desire for what belongs to someone else] except that the law said [Ex. 20:17], "You must not covet."
But I wrote to you not to associate with anyone claiming to be a [Christian] brother who is [guilty of being] sexually immoral, or greedy, or an idolater, or who speaks abusively, or a drunkard, or a swindler. Do not even eat [a social meal] with such a person.
Or, do you not know that evil people will not possess God's kingdom? Do not be misled: neither will sexually immoral people, nor idolaters, nor those who are sexually unfaithful to their mates, nor homosexual perverts. [Note: The Greek uses two words here, denoting both the passive and active partners in male homosexual acts]. And neither will thieves, nor greedy people, nor drunkards, nor abusive talkers, nor swindlers possess God's kingdom.
But you should not even talk about sexual immorality, or any type of [moral] impurity, or greed. [Note: Possibly "greed" here means "desire for more" of such things]. Such talk is not suitable for saints [i.e., God's holy people].
Do not let anyone deceive you with empty words, for because of such things, the wrath of God will fall upon people who are disobedient [to Him].
So, put to death [i.e., stop practicing the desires of] your physical bodies [such as] sexual immorality, [moral] impurity, lust, evil desires and greed, which is [in reality] idolatry.
Keep your lives free from the love of money [and be] content with what you have, because God [Himself] has said [Deut. 31:6], "By no means will I [ever] desert you or give up on you."