dreams go by contraries

used to suggest that the opposite of what one dreams about may happen in reality

The origin of the proverb "dreams go by contraries" comes from ancient beliefs and superstitions surrounding dreams, where it was thought that dreams often predicted the opposite of what would actually happen in real life. This idea was common in various cultures, including in medieval Europe, where dreams were viewed as signs or omens. The saying suggests that if someone dreams of something negative, it may actually be a sign that something positive is coming, and vice versa. Over time, the proverb has been used to express the belief that dreams do not always reflect reality and may instead offer misleading or reversed predictions.