You can never destroy the eternal one, the Self. That essence may be called by different names, but it is always there; you can never create or destroy it.
It’s like buying a new car—the minute you drive it off the lot, it becomes a used car. See how quickly the value changes? In the very same way, every second things are changing.
What is it that is changing? It is the appearance; it is the form that changes continuously. The yogic understanding is to know the never changing in the midst of the ever changing. Everything we see is ever changing, but behind that is the essence, or ‘thing in itself,’ that never changes.