Text:

“Anytime someone in my family is talking about something that has the potential to go wrong, we will knock on wood immediately as a way to protect ourselves or sort of prevent it from happening. If we were in the car or there was no wood nearby, my parents would remember to knock on wood when they got home.”

Context:

My informant’s parents have done this for as long as she could remember. While her parents are immigrants from Asia, they likely picked it up from popular culture. 

Analysis:

The exact origin of this superstition is not known for sure, but some believe it is based on ancient pagan traditions. They believed that spirits and gods lived inside the trees, therefore knocking on tree trunks was a way of asking for protection. When individuals knock on wood, they are engaging in a form of apotropaic magic. Even though they know that knocking on wood isn’t actually going to do anything, many do it as a way of easing their worries. It may be a way for people to feel as if they are in control of their own fate.