There are portions of this post I understand and agree with, and some that make me raise an eyebrow and think. Master has never gone so far as to call me a worthless piece of anything (and frankly, I shudder a little at the thought) but He has certainly employed humiliation and "breaking me down" as ways to take me places mentally and emtionally. Therefore, I can see and understand a little bit of what cadence and lorna (more so in your second post, lorna) are saying, as well as lily and Sir Russell's confusion.
In our (refering to J and myself's) case, I have a substantial ego and a lion's share of personal pride, and it needs to be pointed out to me on occasion that my pride does not need to translate into me being defensive of being submissive or above my Master's requests; instead, that my pride should be in the serving and the giving. For us, the breaking down is simply moving my pride and my ego form one place and purpose to another. For the most part I'm there already but even a decent subbie needs a shove in the right direction now and again!I should add that after the uppity parts of my ego are knocked down a peg, the pride that takes its place is a deeper and more fufilling sense of self to be sure.
So, after all that, I would ask lorna, "what is it that your Masters are trying to break down in you? What is the 'worthless' portion they are looking to replace, and what do they hope you'll replace it with? What do YOU hope to find by rebuilding yourself?"