Anger and its children: rancor, revenge, revenge

Anger is a great ugly beast!
It obscures reasoning, provokes impulsive actions, makes you forget the Truth that seemed to have been acquired, demolishes good words and good intentions, causes an apparent regress of the individual. Every man is easy prey to the anger of this angry and quick beast.
Yet it would be worthwhile to examine with a little attention this quality which is the common heritage of the whole of humanity, so much so that there has never been a man on earth who, at least once in his life, has not had even one, very small and, perhaps immediately repressed, a fit of anger.
If to any of you, io I asked why at a certain moment his anger was triggered, I would most likely hear the answer that his anger was only a personal reaction to another person's action, or to a fact that happened to him. Right, absolutely right, indeed, because anger is truly an individual's reaction to something, I can only approve; however, this answer not only does not explain anything, it is also evasive and does not go deep.
Let us take the classic example of the individual who, in beating with a hammer to drive a nail, misses the point and hits, instead, on his own finger; what is the reaction you get?
On a physiological level, the reaction is the same for everyone: the finger hurts. But, on a behavioral level, the reaction can be different from individual to individual: the priest-eater throws a well-balanced blasphemy into the ether, the well-educated religious is limited to an 'accident' of which the sender is known but the recipient is not known. , the angry passionate throws the hammer and so on; but no one can pretend nothing has happened.
From all these very varied actions it can be seen that, even if the factor that triggers the reaction is always the same, the direction in which the anger is oriented can be different: the blame for what happened is now attributed to God, now to an anonymous entity, now to the hammer. But, in reality, is that so? If we carefully observe the behavior of the angry man, we realize that his reaction is not a simple instinctive reaction, but is a defense reaction of his self-love, it is a directing one's anger outside of oneself for not wanting admit their faults.
In the particular case we have examined, the reaction masks the stupidity, inattention or inexperience of the person who wielded the hammer, factors which imply a negative judgment of oneself, a negative judgment which, since the Ego avoids blame as it would obscure his vanity is attributed to something external in retaliation.
Be careful, I am not saying that you must not vent your anger, your tension in some way, but get used to trying to understand why the release happened in that way and, sooner or later, you will see that the release will no longer be necessary. Anger, when it is a simple momentary outburst, does not cause serious damage because, once the moment of reaction has passed, the behavior returns to normal. On the other hand, it can cause serious damage when its effect continues subtly, generating those degenerate children who are called resentment, revenge, revenge.
In them lies the danger, since it is they that prevent the individual from remembering brotherhood with other men, that induce to interrupt the help that the individual must give to others, that widen the furrows that human actions tend to trace between one man and another, isolating him within his own selfishness.
Anger kills, but it does not kill the object to which it is addressed, but it kills, slowly poisoning it, the intimate of the angry, taking away those feelings of friendship, brotherhood, charity and humility that up to that moment had made him alive. Weather