Hem Aradhana Pure Ghee Diya is useful in temples and our houses during puja rituals and auspicious occasions. In Hindu culture, Diya signifies purity and goodness. The presence of light in our surroundings means the non-existence of evil force and darkness. It is said that according to Bhrama Rahasyam of Sri Agastya Maharishi, the glow of Diya spreads all across our house and invites gods towards it.