Knocking on wood stems from the idea that you’re tempting fate by acknowledging good fortune. This belief takes its roots in an ancient belief that trees are home for good spirits, so by knocking on wooden surface, a person was calling on the spirits to protect himself.
Mirrors are believed to be soul taking mythical items, but what happens when you break mirrors of misfortune? There is talk that breaking a mirror may bring a bad luck for seven years. Some superstitious materials report that the trapped souls have a bad influence on your luck.
Usually we say “God Bless You” after someone sneezes as a gesture of politeness. However, this belief takes its roots in Pope Gregory the Great who said it to people who sneezed during a bubonic plague; according to an erroneous belief that the soul escapes the body during a sneeze and the heart momentarily stops. Thus, Pope Gregory the Great welcomed the person back to life by saying “God bless you.”
A four-leaf clover has long been a symbol of good luck. It has also been used in some traditions for finding a husband or a wife. According to them, first of all you should find a four-leaf clover, and after that you must eat it or put it inside your shoe... After this, there is a belief that first person you communicate after the activation of four-leaf clover will be your future mate…
There are a lot of variations of this superstition, but primarily an itchy palm refers to someone greedy. Many people believe that if the right palm itches, you will lose money, if the left palm itches it means that money will come to you shortly. If both palms itch…you may need to go wash your hands.