In Job, we see an example of persevering without anger or spite. He was sad, he was confused, and he was even despondent and fearful at times, but he was NEVER ANGRY. Is that the real secret to retiring karmic burdens quickly and completely, or is anger more a strength than a weakness?

It is true that anger can sometimes be more a strength than a weakness. If the anger is directed at an unfair treatment, it can help a person stand strong to resist improper conduct and stay in a healthier state of mind through not succumbing to defeat and have that erode feelings of self-worth and confidence in one's own capability. The role of victim is very damaging when it is embraced and a person comes to believe that is their identity. It is locking themselves in a prison of sorts, so to fight back in any way through the emotion of anger can be a healthier outlet and response to an unfair attack of some kind. In Job’s case, that was not warranted because the attacker was his own history—there was no one to blame, no one to find fault with, no one to stand up to and resist. This came in from below, within his being, and without his conscious awareness of its arrival. He felt the consequences sometime later when the discord erupted in physical symptoms. It is possible some might become angry going through such an ordeal. This would truly be counterproductive because the anger would most likely be directed at the self for being vulnerable, or even seeming to be weak and faulty, or to blame one’s ancestry for perhaps having a weak genetic endowment and thereby unprepared for life in some respects, or anger against God for allowing such suffering to befall oneself. This too would be destructive and would backfire because this would lead to bitterness and various emotional states of resentment and formation of grudges that are a quite toxic manifestation of negativity. This would guarantee a worse time and a more refractory period of suffering that could not be easily dealt with through divine intervention. Such negative perspectives reinforced by the strength of the anger, in whatever manifestation it was created, could be a barrier denying access to the divine to help right the wrong. It is like not only saying "no" to healing but blaming the healer for the infirmity being experienced. That is, in effect, saying "no" to receiving their assistance. It is not a question of judgment or causing a deliberate backlash to somehow punish the angry sufferer, it is their own energy deciding what the outcome and the response will be, by predeciding the quality of the relationship and the motives and, in effect, turning their back on the divine in going down that path. Under such circumstances, the divine must stand aside until there is an opportunity for healing to eventually reach this dark interior and begin to change things. That is uncertain as to where and when it might even occur, so the suffering will be unrelieved.