A. through your destruction / I stand up. This line implies that it is precisely because of the "destruction" of the other person, which the persona is able to feel "through" or empathise with, that the persona is able to "stand up", or help himself.
Another way of saying is that the persona learns great things by letting his mind go through the "destruct[ive]" events that the other person had gone through. The words "stand up" connotes victory in adversity, or improvement to become greater than what the persona used to be.
Thus, one is able to learn and improve through others' struggles.
Hope this helps! :)