Complex sentence: It presents yoga and vrata like the Bhagavad Gita, but as a discourse from Shiva, and after Vishnu and Shiva hug and Vishnu invites Shiva to explain the nature of the world, life and self.
Split into simpler sentences: It presents yoga and vrata like the Bhagavad Gita, but as a discourse from Shiva. The discourse begins after Vishnu and Shiva give a hug to each other, according to the text, and then Vishnu invites Shiva to explain the nature of the world, life and self.