(Teachings from Gita) The whole world emerged from God and He pervades the whole world. Sun, moon, wind, fire, all the other deities and all the living beings are just different forms of Him.
The yagya performed for deities and ancestors is a form of Him. He is in the yagya as: plants, grains and herbs required to create the fire; vedic hymns chanted during the yagya; the ghee used to fuel the fire; the fire and the final invocation which ends the yagya. Hence, the materials, hymns, vessel and the human efforts that go into the performing of the yagya are all forms of God.
Everything is God. To those who don't understand the essence of God they appear to be in different forms, shapes and sizes; but in reality there is nothing but God in everything living or non-living.