"Superstition is foolish, childish, primitive and irrational - but how much does it cost you to knock on wood?"

This quote by Judith Viorst is a suggestion that superstitions are unreasonable and ought to not be taken seriously. Superstitions are often seen as a method to bring all the best or ward off bad luck, however in truth, they are absolutely nothing more than a way to kill time or make us feel better. The quote is asking us to think about the expense of superstitions, which is normally absolutely nothing more than a few seconds of our time. By knocking on wood, we are not actually doing anything to change our luck, but we are still wasting time and energy on something that is ultimately meaningless. The quote is a pointer that superstitions are not worth our time and energy, which we ought to focus our efforts on things that are actually productive.