To forgive is to come to the realization that your negative judgement of someone was incorrect. Forgiveness is about you and your happiness. It is not about the extending of a pardon to the person who wronged you.

"Men forget, but never forgive; women forgive, but never forget."
Robert Jordan

I don't judge, so forgiveness is not mine to give. If someone screws me over, I move on, but they simply become a non-person to me. If someone screws up, hey... We all do.

Any kind of atrocity that destroys a child psychologically or physically is unforgivable.

Not always, but it's a personal choice. I feel what questions like represent is the capacity of people to make allowances for being teared like shit. More appropriate should be questions regarding teaching behaviors that respect fellow humans, and don't take the imposition of forgiveness. Too many people prey upon the gullible, naive, and nice. That should not be forgivable. Willful mistakes aren't accidents. Deliberate actions shouldn't be disguised behind someone else's acceptance of excuses.

Cheating on someone is unforgivable... Humans do disgusting stuff and just be prepared to go thru tons of weird , crazy, unbelievable stuff..,you don’t have to forgive anyone,,,, I just don’t forget how they treated me...

I tend toward forgiveness because it’s who I am. I can’t hold grudges, no matter how hard I try. I learned a few decades ago that forgiving allows you to grow as much as it will hopefully help the other to grow, if they were genuine in their apology.

You meam axe-murdering, say, an entire family, for instance? Or wiping out entire civilizations in genocidal insanity?
I can think of many, MANY unforgivable things!
If they are SORRY? I think it's possible to show mercy without forgiveness. The judgement might then be atonement combined with severe punishment.
Guess it all depends.

There are some things that are unforgivable. Just knowing that the intention was ever there for certain heinous acts is enough to cut some people off permanently.

Forgiveness for heinous acts requires more than a facile apology. Serious crimes requires serious acts of redemption.

I believe in second , third and fourth chances!!

Sometimes people are genuinely sorry, but simply can't change. You can forgive them 1000 times, and still be right were you were 999 times ago, but with a lot more drama and baggage between you. It's a lesson I learned and will be smarter in the future. Life is short, one strike, you're out is my new motto.

Depends on the transgressions

For me, if someone is genuinely sorry for what they did, recognizes what they did wrong and makes amends by never doing it again, they've earned my forgiveness.

There are only 2 people in my life who will never earn my forgiveness, and they're not in my life any more. They're 2 extended family members who were supposed to be taking care of my aging, bedridden mom, but instead committed criminal acts against her, including attempting to kill her and successfully kidnapping her. They messed with her meds in an attempt to kill her, but got cold feet at the last minute and allowed her to be rushed to the emergency room where she got the help she needed and was saved. She was removed from their care by social services after that and put in an elder care facility. Her health insurance would only cover so many months there, though, so eventually, these extended family members were counseled by the elder care facility on other facilities that could care for her. The family members disagreed with all of it, though, because they wanted my mom's money for themselves and didn't want to use it for her care. So they came up with a plan to kidnap my mom, showed up at the care facility the next day, told them they were taking my mom home, and instead drove her nearly 2 hours away and dropped her off at a poorly maintained facility in the middle of nowhere, intending to leave her there. When social services found out, they got my mom back home, back to the other facility and began legal proceedings to get my mom completely away from those family members. The family members tried plenty of other things while all this was going on, and afterwards, including attempting to change my mom's will without her approval, attempting to sell my mom's house, and successfully stealing some of her property from the house. Some of these actions would have harmed me, too, since I was supposed to be a recipient of some of my mom's financial and physical property after she passed. If all of it had gone to these family members, I wouldn't have gotten anything.

...All of which is to say that had these family members recognized that what they were doing was wrong and, in fact, criminal (had my mom ever pressed charges, they could have gone to jail), I would have eventually forgiven them. But because they believed they deserved to treat my mom that way, and didn't care that I'd get hurt in the process, and because they both openly told me they'd "done nothing wrong," they'll never earn my forgiveness and I cut them out of my life completely. I've had no contact with either of them since 2013 and never will again.

I think that your question is indicative to the real issue. There are very few things that are unforgivable, if the person is worthy but if they are not sorry or they continue to hurt you or others, cut the cord. Get them out your life.

case by case. i cannot generalize about this. also, some offenses are cumulative. twenty little offenses may add up to the last straw that renders someone unforgivable (someone, not something!) while one real biggie properly understood, apologized for and corrected may be forgivable. there is no one answer to this question.

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Define"genuinely" and how is it defined or measured.

Being genuinely sorry has nothing to do with it. It's actions and behaviors. But yeah, some thi ngs are unforgivable. If someone is genuinely sorry for raping a kid, I really don't care. And I don't care how much good stuff thye do in the future. If my neighbor is genuinely sorry for letting her dog crap on my doorstop, I just want to know she's not going to do it again.

Somethings are unforgivable

Many things should not be forgiven, as the act itself is representative of some deeper meaning. An example would be a man hitting you, for which he will likely be sorry. F him, move on. If you don't, the only question is when he will hit you again, not if. Why would you forgive that?

Personally I feel some things are unforgivable, child sexual abuse, animal or human torture. Cruel teasing, making fun of or belittling others I can forgive if they are sorry and really change but some have no interest in changing or learning a better way. I find families can be the biggest offenders because they assume you have to put up with it.

I've heard psychologists and others say that you must forgive those who have wronged you, for your own mental health. To that, I say hogwash! I don't have to do a damned thing, least of all forgive. If there's one sanctuary I have, it's my mind — and what I do there is my business, and mine alone. If someone has intentionally harmed me, or inadvertently done so because they have deep personality flaws, I have no obligation to forgive them their misdeeds. I might do so, under some extraordinary circumstance, but my forgiveness is earned. I'm also, however, under no obligation to hate anyone; just because I don't forgive someone doesn't mean I hold onto hate or ever even think about them. That, too, is my prerogative. But, no, I have no rules about what types of offenses are worthy of forgiveness and which are not; it all comes down to the individual.

It's really hard to see genuine sorrow in words. It must be through actions. This however can be a slippery slope as for example, person x might kill someone at one point in time, but then, if not captured, tries to repent. But then he gets captured. Would he still have to serve time if he ends up being more helpful? I guess I see your question as, who would be the judge? Is it the affected family of the victim, or is it the justice system?

            Why Should We Forgive?

Indeed, why should we forgive? What's in it for us to forgive others, or even ourselves for that matter? Are there any liabilities, losses or downsides if we practice forgiveness? If we forgive others, doesn't that then mean that they no longer owe us for that of which we are forgiving them? Is there any kind of a net gain or loss in practicing forgiveness? If there is a perceived net loss in forgiving, then of course it appears that it would not be wise to do so. For once we have given up that thing to which we are holding on to for dear life, then it is gone forever, never to be in our grasp again. It is like letting go of a wild bird or some other creature that will then disappear into the bushes or dark night.
But do we really have a hold on to it, or is it holding on to us? Like a rich man on a sinking ship at sea who is clinging to his bags of gold, does he have the gold, or does the gold have him? Why don't we let go of the things which are weighing us down in heart and mind? Why won't we let go of these things when it will surely be to our advantage to do so? The rich man will die from his pride and lack of faith in himself that he could amass even MORE wealth once he was on dry land again. At the very least, he could sell his story of his own near drowning! With the lesson learned that the gold would have brought about his death, he could have then shared it with others and maybe kept them from an early demise as well! For there is no gift nor wealth so precious as life itself! No amount of anything that can be measured is worth even the smallest amount of love and forgiveness, that is how valuable it is.
It is not a question of asking how do we find it in ourselves to forgive others and ourselves, it is a question of what will be the result of our not forgiving? Will the result be that of being eternally weighed down with what is killing us? Doesn't that which we are compulsively clinging to stifle our love? Our joy? Our survival? Our ability to thrive? We MUST let go of the things which hinder us just as surely as we must not hold on to even bags of gold if they are going to kill us. We must maintain our freedom. The drowning man may as well be holding on to bags of rocks or lead for all the good it will do him! A dead rich fool is no better off than a dead poor one!
As has been said before, forgiveness is for those things which are unforgivable. Meaning that all can be forgiven, and with no bad consequences to it, if we really do desire to forgive and then learn from the lessons about forgiveness that are being taught to us. So are you ready now to forgive? What will you forgive? Whom will you forgive? Why will you forgive? How will you forgive? Will it be conditional or unconditional forgiveness? If it is conditional, then it's not really forgiveness at all, it is something else, something less than that. At that point, it will be a mockery of forgiveness. Is it really trust if you are always verifying, checking what it is that you are actually supposed to be trusting of? Forgiveness is forgiveness just as trusting is trusting. They are either there or they are not. You cannot say that you are trusting someone if you are constantly checking up on them. That's not trust, that's chronic DOUBT!! You are not forgiving someone if you are putting conditions and stipulations on them in order for them to be forgiven. Either trust the person or don't. Either forgive or do not, but please don't make a pretense out of it as that only serves to make things even worse than they already are! If you make a pretense or a lie out of forgiving or trusting, you will only cement in even tighter the bad feelings that you have about the situation. It will be like making yourself small enough to fit inside the bag of whatever it is you have as it sinks to the bottom of the ocean.
The process of forgiveness is not quite as easy as it is for us to breathe, for if it was, then we would be forgiving with each breath that we take. But, it can be done! It is done every day by those who truly do wish to forgive. We need to start out with the idea that some small things can be forgiven, and then find a few of them to forgive. And then find a few more, and forgive them as well. After a while, it will be easier and easier to find more and even bigger things to forgive too. All the while, we will be growing larger and larger, until the bags of stuff are mere coin purses to us and the deep ocean is no more than a puddle of water after a spring shower.
Forgiveness is the greatest gift that one could ever give or receive. If one cannot forgive for the pure joy of doing so, then the lesson of forgiveness has not yet been learned. Forgiveness IS a gift in the truest sense of the word. It has no obligations to it at all, it is not nor can it ever be forced from someone or upon someone, as it then loses all meaning of a gift. A compelled gift is no gift at all, it loses all of its beauty and value then. A forced gift becomes NOTHING but a burden upon someone. It becomes a heartache. The ill will attached to a compelled gift of any kind will far outweigh all else. So we must always be vigilant that we do not forgive out of ego driven reasons; to prove that we are better than another, or with the expectation that they will reciprocate and forgive us as well. Maybe they are not ready yet to grant any forgiveness. So we must content ourselves with the idea that we have forgiven and will continue to do so despite all of the "good reasons" not to.

Some things are unforgivable. It depends on how the victim wants it to be.