Passion

Passion is a marvelous thing. It can bring out the best and the worst in people. But whichever the case, it brings out people from their often otherwise muted feelings and personalities.

In some contexts passion is down right ugly, among the worst displays a person can reveal - anger, frustration, and revenge. But conversely it can be among the most magnetic, engaging and positive of all expressed emotion as well - love, excitement, happiness, laughter, optimistic.

So why then is passion something that is so forbidden in most personal and professional contexts. Why is it more often the shouldn't than the should? Can one imagine the world without passion, would we not lose one of the most human of all expressions in emotion. The catalyst of nearly all things human?

They haven't yet (and I say yet) created any non-living creature that has passion. Other animals may display emotion also, but not nearly to the degree of people. We have been provided with many gifts to display our emotions:

Eyes: The window to the soul. Many times our emotions can be seen through our eyes.
Mouth: We can often speak passionately via the tone/volume we use. Language and words also play an important role in passion served via our mouth.
Ears: Hearing emotion is easy. Just imagine yourself on the phone when you've heard passion in what others are saying.
Nose/Tongue: I won't go so far as saying that these can't be utilized to show emotion and will just leave it at that.

I've taken this farther than I intended but just am interested in why passion is such a taboo when it oftentimes is what makes leaders (and followers) of people, and which more than perhaps any other quality, defines us as human. Isn't that a good thing?

Discuss.