We have all heard the story about the person who went to a party and woke up in a bath filled with ice minus one of their kidneys.
Then there are people who swear they have seen Bigfoot or glimpsed Nessie in Loch Ness. Some believe the military have a secret site called Area 51 where they keep captured UFOs and extraterrestrials. These urban legends get passed around until they are accepted as fact.
This happens in the spiritual realm as well. Certain statements become so well-known we just assume they are in the Bible like “God helps those who help themselves.”