The quote from Carlos Castaneda's "Separate Reality" suggests that our perception of the world is shaped by the narratives we create for ourselves. Essentially, the way we define and understand reality stems from the beliefs and descriptions we adopt. If we choose to change these narratives, our perspective on the world can transform as well.
Castaneda implies that this shift in perception can be jarring, indicating that one may not be prepared for such a drastic change in understanding. By ceasing to impose our constructed views on reality, we could discover a different existence. It highlights the power of belief in shaping our experiences and urges reflection on how we contribute to our own realities.