Palmistry

Your hands are essentially like a map of your life. Your hand is like your mini-self, the microcosm to the macrocosm that is you. Your thumb is akin to the head, (although the forefinger is often associated with the ego). But the thumb is what separates us primates from the rest of the mammals. The four fingers represent the arms and legs.
Every line, every mark on your hand says something about your personality. Even the length and shape of your fingers is telling as to who you are as a person, how you think and interact with others.