The moon is the presiding deity for the mind. Today, it is Poornima (full moon day). What does Poornima signify? It means the completion of the full circle by returning to the starting point. One half of the circle is represented by worldly life. It is like the letter “C”. This is equated with science, which is incomplete knowledge. The full circle represented by the moon represents the state of the mind when it is filled with Love. Guru Poornima is observed today.  Gu means darkness and Ru means dispelling. Guru means one who dispels darkness. Guru Poornima is the day on which one celebrates the dispersal of the darkness of ignorance from the mind. Hence, people should fill their minds with the all-embracing Love Principle. To experience the fullness of Love, you have to fill your hearts completely with Love. That will be the result of total devotion.

Sri Sathya Sai Speaks V27:Ch21, Divine Discourse July 22, 1994