In plain words
All that you see with your eyes in the world today, hear with your ears and experience with your mind belongs to pravṛtti. Nivṛtti is the principle beyond the mind and the senses. Rāma taught that path of nivṛtti. This is the chief principle of the Veda. Rāma was born as the son of Daśaratha. But he is not Daśaratha's son; he was not born of Kausalyā's womb; he was born of the sacrificial fire. So the principle of Rāma does not belong to the world of nature; it is a principle beyond the Manas and the Buddhi.
Mantharā's former birth
Kaika loved Rāma dearly. Kaika treated Rāma with even greater love than her own son Bharata. But who was Mantharā, who came in between? Once, when Kaikeyī's father, the king of Kekaya, went to the forest to hunt, he came upon a pair of deer, a doe and a buck, playing together. At once the king of Kekaya shot the buck with an arrow. Weeping, the doe went to her mother: “Mother! This king of Kekaya has killed my husband. What will become of me now?” she said. Then the mother deer came to the king of Kekaya: “O king! It is not good to part a wife from her husband. It is not right that you, a great king, should take to such a deed. The very deed you have done now will bring unrest into your life. Just as I am grieving at the death of my son-in-law, so you too will grieve at the death of your son-in-law. And I myself will be the cause of it,” she said. That very deer was born as Mantharā, brought about Daśaratha's death and caused grief to the king of Kekaya. If you enquire in this way, many such proofs are found in the Vedas, the śāstras and the Purāṇas. The Vedas, the śāstras and the Purāṇas are bound to one another inseparably. They rest on one another. You cannot divide them, saying that one is one thing and this another.
Even the touch of the wicked is very dangerous
Mantharā had the old resolve in her mind. The thought arose in her to tell baseless tales against Daśaratha and spoil Kaika's love for him. Meanwhile Daśaratha was coming in procession, with music and drums, to give Kaika the happy news of Śrī Rāma's coronation.