Firstly, to clarify what I mean: There are some spells which use mirrors to 'reflect' a curse, psychic attack, or other negative energy back to its source. It is as it sounds, as in a representation of the often nebulous concept of the origin is surrounded by mirrors or reflective objects to represent this purpose. Some versions have the box being enclosed, to symbolize a permanence, and then the entire unit is discarded, symbolic of both letting go of whatever energy had been sent the target's way, as well as expressing that the working should exist in perpetuity, never to be undone by the person who set up the box.
But there is one serious caution: Sometimes a person is the source of their own misery, often without even realizing. Sometimes a person may believe that some string of less-than-ideal life circumstances are the result of a curse, and it causes a bit of an obsession. It results in a lot of negativity coming from that person, about their own life. It may very well compound into something more, as they lose confidence, lose hope, and increase fear. All the while, they convince themselves nothing is going to work out, everything will fail, and more. All of this negativity compounds upon itself, and the person believes that the increased expression of everything must come from elsewhere.
Doing a mirror box, should it work as intended, may very well be reflecting a person's negativity back upon themselves, if they are the source of their own misery, or their own belief in being the target of negative workings is the reason they are experiencing even more unwanted events and circumstances.
These workings are often best used when an actual external source is known, to avoid this possible outcome, if at all possible.
I find if one cannot tell whether the source is coming from themselves, or from another, it may be better to just ground the energy or whatever they are experiencing.
I think there are a lot of knee-jerk reaction types of workings which some people do, and it's the sort of thing that gets people into a tight spot sometimes.
It demonstrates the importance of being sure, or at least of doing divination to have better clarity for the work in mind.
Of course, because some people do not think things through, nor do they think about all the possibilities or sides of things before making a decision.
They give into their programming and fear they must be under attack and do not even consider that they themselves may indeed be the ones responsible for their run of bad luck, misfortunes, feeling whatever it is they feel, etc., or that they may have some contributing part in doing so, anyways.
