Envy can wreck countries, churches, homes, and your life.  It is a powerful sin and one that Christian's aren't always very concerned with.  If a pastor came in falling down drunk to the worship service, people would be concerned!  If a deacon's wife came into church with a string bikini on, Christians would be concerned.  If someone grabbed a huge wad of money out of the offering plate and ran out the door, we would be concerned.  But sometimes people can scream at others and attack others verbally on a regular basis, even creating factions against others at meetings and we take it in stride?  We shouldn't.  The Bible warns against it!