Om - Hindu Symbol and the Divine sound. Gaytri mantra is one of the oldest and most powerful mantras. Meaning "O Divine mother, our hearts are filled with darkness. Please make this darkness distant from us and promote illumination within us.
Taiji, the "Supreme Ultimate" state of undifferentiated absolute and infinite potential is the oneness before duality; from here Yin and Yang originate. (Guide to the I Ching, China's most popular means of divination)