Could you elaborate on how you would approach getting to the root cause of the resentment? And then once you have identified the cause, how would you go about dislodging that?
Sincerity as to what you are feeling each moment is the first step towards it.
If you are actively denying or dissociating (i.e., meditation), you won't get to understand how it all works. Resentment, or any other affective issue, is to be curiously explored with awareness and attentiveness (what are the emotions involved? what are the beliefs? why do I feel this way? how does this feeling operate? etc). Once you have fully explored something -- and this is where dogged determination comes into play -- there comes a point where that issues vanishes like dropping hot coal. Not unlike ceasing to believe in Santa Claus.
It does take time and persistence in the beginning.
Mindfulness is actually 180 degrees opposite, as it leads to a form of (acute) emotional distancing. Having done Vipassana in the past I can also say that from experience.
First of all, when you say:
> to be curiously explored with awareness and attentiveness
To me that sounds like introspection (correct me if I am misunderstanding). You say that disassociating from your emotions is the wrong way to go about it, but how can you do true introspection without disassociating a little? Otherwise wouldn't your introspection be clouded by your emotions?
I was wondering if you had any thoughts on Acceptance and Commitment Therapy? To my knowledge, the main idea of ACT is that you don't avoid negative emotions or feelings but instead accept them and attempt to passively observe them.
In any case, whether you answer these questions or not I appreciate the conversation. It's always interesting to learn about new philosophies and criticisms of other philosophies.
[1] Reports of two of them becoming free are available online: https://www.actualists.org/reports/newly-free