Jealousy is such a complex concept. I find it more of an idea rather than an emotion. Jealousy causes people to do some of the scariest thing. It causes words like "scheming" and "cunning" to appear in the dictionary.
If jealousy didn't exist, people would not be killing one another for something they all yearn to have.
If people were not jealous of others, there won't be such things as enmity.
But it's not as easy as we make it out to be. Jealousy works in a very subconscious manner. We may not know of it. Every now and then, when someone is better off than you, you might try your best to be bighearted and congratulate that person. Yet deep down inside, you feel really pissed off and then you do something. This something can be good. It might be motivation for you to work even harder, so you will achieve more than what that person has. Or it might be bad. It might cause people to steal, or even worse estrangle relationships.
I wish jealousy would be a source of motivation for me, but more often than I would like, I find it inflicting harm upon me. Which is not good. Not good at all.
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Here's a sonnet by Elizabeth Browning. It suddenly came to mind today when I was trying to write poems.
How do I love thee? Let me count the ways.
I love thee to the depth and breadth and height
My soul can reach, when feeling out of sight
For the ends of Being and ideal Grace.
I love thee to the level of every day's
Most quiet need, by sun and candlelight.
I love thee freely, as men strive for Right;
I love thee purely, as they turn from Praise.
I love with a passion put to use
In my old griefs, and with my childhood's faith.
I love thee with a love I seemed to lose
With my lost saints, I love thee with the breath,
Smiles, tears, of all my life! and, if God choose,
I shall but love thee better after death.
Yes, better after death. =D
The tears you shed
Mystified images of dread
I look into this mirror of sorrow
Only to see the fears of tomorrow
Feelings conjured up my mind
Yet this loss I can never find
I close my eyes but to see
How we gave each other up so easily
We were blinded by the rays of anger
Misguided from the path of eternity