I don't need glasses, but once I bought some without prescription just to change myself, because I was getting so tired of myself, and "feeling stuck". The effect was strong.
It was almost scary- I started questioning everything about myself...maybe I could completely change everything I am? Like, even my mind, my morals, my interests and friends? I was excited!

It started to get scary for me, but in a way enjoyable. I felt everything was possible.

In many ways this unstable identity is a core issue of BPD- but also a tool to change certain negative behaviors, since in many ways we are far more flexible than most healthy people, and in that regard, it is easier for us to change.

The issue is sticking to the positive desirable changes.
We are so flexible and changeable, in that way we are amazing. At the same time we can't control it- we need to change depending on outside factors, so the result is extreme instability.

I think people who recover from BPD use this flexibility and changing potential to re-shape themselves. What I don't know is how they stick to it.