Sun and moon tattoos signify the basic principle of life, i.e., where there is good, there will also be bad. They also represent the fact that everything has a dark and a light side. Nothing in the world we have created is perfect. The essence of being human is the lack of perfection. Both these ideas occur simultaneously in everyone’s life and there cannot be only good or bad in any person’s life. As the sun rises and sets everyday, every person has his days of glories and nights of darkness in his life. Some people also believe that the union of the sun and the moon represents unity in diversity or the feeling of oneness. Another interesting significance of sun and moon tattoos is the unification of the masculine sun and the feminine moon. Sometimes, the intertwined half sun and half moon tattoos are used to signify love and marriage.