Taijitu

Taijitu is a special symbol made up of two circles that are connected together. Each circle represents two opposite forces. The dark colored circle represents Yin, which is the passive, contemplative and creative force. The light colored circle represents Yang, which is the active, assertive and logical force. Together, Yin and Yang represent balance and harmony. So when you look at a taijitu, it's a reminder that balance is necessary for all things to be in harmony.