ANGER [THE SPIRIT OF ANGER]

Anger
A strong feeling of displeasure and
belligerence aroused by a wrong; wrath;
ire. ... Anger , fury, indignation, rage imply
deep and strong feelings aroused by injury,
injustice, wrong, etc. Anger is the general
term for a sudden violent displeasure: a
burst of anger.

Anger when not being controlled causes a lot bad things like acting in a very wrong way it can also causes destruction and even death..
we have seen several cases of Anger leading to death..
The funny thing about about Anger is that when it has done damage to someone such person will immediately come back to his normal sense. 

It's also been said that a decision while one is angry has the a very high probability of being a wrong decision...
The thing most people fail to realize about anger is that it is very useful in getting things done in the right way, am gonna buttress on this point. 
-When one is angry he/she should try and use it as a source of motivation.
-Anger can also be used to take good decision and according to some research i did the best decision are made when one is Angry, all you have to do when you're angry is to calm yourself a bit not totally then think about what you're about to decide on.

while doing some research on Google i came across this so i decided to add it .

ADVANTAGES OF ANGER
Although uncontrolled anger can be quite costly, when channeled properly anger can also be very positive. Among other things, anger can motivate us to work harder to accomplish our goals. This could mean playing harder on the defensive end in a basketball game, studying longer for an exam, or putting in more time when learning to play an instrument.

Anger can sometimes lead to newer, higher level goals, possibly fueled by the desire to prove others wrong. Perhaps anger and frustration due to getting cut from his high school basketball team are what inspired Michael Jordan to achieve such greatness in his sport.

Anger can also alert us that something is wrong and that we need to respond. When we defend ourselves or defend someone else, it is often our anger that spurs us into action. This can be the love of a mother protecting her child, a classmate or colleague standing up to a bully, or an innocent bystander intervening on behalf of a victimized stranger.

Generally speaking, anger is what prevents us from passively accepting societal wrongdoings and ignites us to take action. Many of society’s most important changes have come about because people got angry with the way things were and set out to correct those injustices. Some examples include the Women’s Rights Movement, the abolishment of slavery, and the Civil Rights Movement. 

Over the years, many groups and organizations have formed in an effort to channel their anger in a positive, constructive manner. Among them are Mothers Against Drunk Driving (MADD), People for the Ethical Treatment of Animals (PETA), and the numerous anti-hate groups that exist today.

Outraged by the mistreatment of others, many have pushed for new laws over the years including those to protect children, the mentally ill and mentally challenged, people of different religions and ethnic backgrounds, the handicapped and disabled, and many other groups. Countless people have been helped by the actions of those who experienced anger and decided to do something positive to make things better.

So the next time that you lose your cool and say or do something that you regret, just remember that anger does not have to be your downfall. Instead of blaming someone else or wallowing in self-pity, take responsibility for your actions and get to work on improving your anger management skills. After all, look at all the great things that can be accomplished when anger is channeled properly.

CREDIT: MztarKiddah