Stuart's Daily Word Spot: Jealousy or envy?

Jealousy: noun - overwhelmingfear, suspicion, or belief one is, or might be, displaced in someone'saffections; distrust of the faithfulness of a spouse or lover; of God - Hisintolerance of the worship of other gods (which has always struck me as an oddquality in a being supposed to be omniscient and almighty); resentment or envyof another person or his or her possible or actual success, advantage, orsuperiority; rivalry; concern or anxiety for the preservation or well-being ofsomething or someone; vigilance or care in guarding something or someone.Envy: noun - feelingof resentful or discontented longing aroused by another person's betterfortune, situation.
As is so often the case with alternatives in English, itsvocabulary culled from so many different languages, there is some overlap inthe meanings of these two words. However, jealousy is generally used to conveythe emotions felt in areas of possession and protection, and envy generallyexpresses a desire to actually have what the other person has (instead of them,rather than as well as).
'One day, your insane and unfounded jealousy will drive awedge between us, destroy all the love I feel for you, and send me out of yourlife for good.'
'Mary guarded her new baby with that jealousy only the newmother knows.'
'Derek was consumed by envy of his neighbour to the extenthe plotted murder so that he might take all those things he thought the man hadbut didn't deserve.'