So here is the run-down of the ongoing whittling of the term 'weakness' that we have put this together so far. This is not so much a definition of weakness as it is an ongoing delineation of it that is probably never going to be finished.
1) We have posited an individual and their separate external circumstances and judged them to be less effective or ineffective at reaching an end using a certain means; this can be because of lack of ability, good sense, or by simple circumstances outside of their control (ie: lion hunts gazelle, squirrel is run over by truck, etc.).
2) We have reached a certain end using a means, and in so doing have compared this end and means to others who have attained or are in the the process of attaining some end using a means, one or both of which we see as lesser. This can be because of the ineffectiveness of the end in achieving other ends or by a perceived discrepancy between the will of the individual and the end itself; the in itself and for itself of the end (ie: he's always eating, but because of this he is fat and unhappy).
3) A relationship of exploitation is revealed whereby in the judgement of the ends and means the observer takes as implicit a certain desired deficit for some purpose that can be for themselves, not, for someone else, or all (ie: this group is lower than us because they are weak). In this case the weak person has the weakness enforced on them in an external or internal way, so that it wouldn't exist without being made into an image or idea.
4) The determination of the weak is turned in on itself, and viewed as such it displaces the weakness that was previously thought primarily of content into one primarily of form (ie: it is weak to believe that only to be strong should be desired, etc). The weakness is found to be in the belief that the weakness is somewhere 'out there' where it is observed and we can see it as if we were neutral observers.
These are the aspects of the weakness idea as we have outlined them, but not it's true definition. All four taken in isolation seem to fail to tell the whole story. For instance, (1) and (2) both suffer from the limitation that they use the language of images as if they were concrete realities. (3) tells us something, but it seems somehow absorbed into itself. (4) is the closest approximation to what this thread has been revolving around.
The question I have for you at this point is, "does (4) deserve to be part of our notion of weakness, or should it be cast out as unnecessary?" What is good about (4) in relation to the other three we have here? Just another reminder that these four don't constitute and exhaustive list, only what we've managed to cobble together here.