Strongly believed in their unique traditions and customs, Thai people have always been holding on the ritual ceremony on important occasions of their lives concerning "Kwun"(Spirits or soul), for example, Rub Kwun Dek ( To bring back the child's spirits ), Tum Kwun Nak ( to restore a person's spirits before getting into monkshood ), and the rite of Bai Sri Su Kwun in welcoming ceremony for important persons."
The rite of Bai Sri Su Kwun, which its origin is still unclear, is proceeded by a person called "Mor Kwun"(a witch doctor), who cannot tell us either when this ritual activity first began. Presumably, it could begin since the very old time. Thais believe that all individuals has their own natural resource called Kwun (Spirits), which would take care of them throughout their time of living at anywhere they are.
The word "Kwun" is intangible i.e. it is invisible and untouchable, but it is noticeable by feelings. If one's Kwun was still with him/her, he/she would normally feel happy. In contrary, if one's Kwun was not with them, one would feel differently. Thai people believe that the rite of Bai Sri Su Kwun is a ritual activity that would encourage their mental strength. The strong mind would support them to, as they wished, succeed their tasks .
The word "Bai Sri" means auspicious rice, a symbol of lives related ceremony.