Your dead ancestors are governing your destiny and performing Tarpanam will appease them. Tarpanam means food offering for the ancestors. During the New Moon day, these departed spirits come to the earth plane at dawn and leaves during sunset. They do in fact hang out with you or with your brother or sister or any other relative. The Siddhas reveal that even your enemies in your current life, are your reincarnated ancestors for whom you did not Tarpanam.