Narrative from a Mentally Ill Patient

In the eyes of others, Yu is also a mental patient, but is she really sick? Thoughts that transcend the real world and deep thoughts on the existing world. Just because of different thoughts, he is defined as mentally ill by others. So how should we define this "spiritual problem"? Is there only one "I"? How many "I's" will appear in the body? What concepts do these "I's" have in mind? Welcome everyone to Yuye, my spiritual world.