bói ra ma, quét nhà ra rác

Phrase

 * 1)  being a medium and getting "possessed" at some point is as predictable as sweeping your home and getting trash
 * 2)  don't be gullible and buy into medium, fortune-telling or divination nonsense
 * 3)  it's easy to be susceptible to confirmation bias, or to make a self-fulfilling prophecy