My informant told me about this ritual when we were visiting a Hsi Lai Temple, a Buddhist worshiping center. She told me she had learned this from a monk when she was little girl attending Temple. She uses this method to answer a lot of personal and financial question. An example of questions that she was ask are “Will this business deal be good for the company?” and “Will my daughter get into college?” I asked her if she truly believed that Bwa Bweis revealed the best answers and possibly, the future. My informant replied that for her, they have never been wrong.
I think that this form of fortune telling is a way to emphasize and support the idea of destiny. Since the questions asked tend to be ones that reveal what will happen in the future, the answers seem to suggest that the future is set in stone and is just waiting to happen. At the same time, I also view this practice as a stress reliever of sorts since the questions are usually associated with stress-inducing topics. By getting an answer, the person no longer has to really worry anymore since the result is inevitable.