This enforces the idea, which I believe is absolutely true, that our identity, the concept we have of ourselves is actually a persona created by us, throughout our entire lives, built from our experiences, memories, traumas etc. It is not set in stone. It is a fabrication. We can change it at will. We could even destroy it and build a new one from scratch. Once you realize this, you can see how powerful this is. You can in fact do anything or be anything just by manipulating your persona and putting in the work to make it a reality.