I dreamed that I was a teacher of Yin and Yang.

No, your dream is amazing. Maybe it really has something to do with past lives. My friends and daughters always dream that she is by a luxurious pond. In front of her is a beautiful child in a blue robe, but she always turns her back on her. She has the same dream and experiences the same scene every half month ... and then she goes to a very clever temple to tell her fortune. She didn't mention her dream. The old monk there said that she was the emperor's concubine in her previous life.