Advaitic idea of vivatavada is not an actual transformation of God into the universe. It's talking about God who has become, second stage, who has become this universe. To the enlightened person, this year is God shining through in every person and activity. The worldly approach to this world is 'this is all that there is' - we are trying to grasp hold of it.
Swami Sarvapriyananda teaches Chapter 10 Verses 4-6 of the Bhagavad Gita. In this series of talks, Swami Sarvapriyananda unfolds the highest truths of Vedanta through the study of the Bhagavad Gita (The Song of God).