12:15 beware of covetousness. Apparently this is a very hard lesson for Christians to learn, especially in lands and times of affluence. The frequency of Biblical warnings about this sin may indicate its seriousness. Note, for example, such Scriptures as Exodus 20:17; Matthew 6:19-34; Acts 5:1-10; Romans 14:17; Ephesians 5:5; I Timothy 6:6-10; and James 5:1-4, among many others.