‘Abdu’l-Bahá replied that superstitions were of two kinds; those that were harmful and dangerous, and those that were harmless and produced certain good effects.
For example, there were some poor people who believed that misfortunes and punishments were caused by a Great Angel with a sword in his hand, who struck down those who stole, and committed murder and crimes.
They thought the flashes of lightning were the weapons of this angel, and that if they did wrong they would be struck by lightning. This belief caused them to refrain from evil actions.
The Chinese held a superstition that if they burn certain pieces of paper this will drive the devils away; they sometimes burnt these pieces of paper on board ships when they were travelling in order to drive away devils, and by so doing they set fire to the ships and destroyed many lives. This was a type of dangerous and harmful superstition’.