In plain words
But Saramā, the wife of Vibhīṣaṇa, and his two children looked after Sītā with great care and kept speaking kind words to her, so that she would not grieve. It was only because they kept guarding her in this way that Sītā could stay brave in the Aśoka grove. “Even in this Laṅkā there are people so good!”: she was amazed. Rāvaṇa knew that if he touched Sītā he would be burnt to ashes. So he tried in many ways to win her over with words. But Sītā did not even look at his face. When he reviled Rāma, she picked up a blade of grass, threw it before him and said, “Before Rāma you are lower than this blade of grass.”
The story of Sītā's former birth
Here you should know a little of the story of Sītā's former birth. In her previous birth Sītā's name was Vedavatī. She was doing tapas with the longing to marry Viṣṇu. One day Rāvaṇa saw her and told her to come with him to Laṅkā. She refused. He seized her by her braid and dragged her. At once she raised a fire of yoga: “In my next birth I will marry Viṣṇu, come to Laṅkā and destroy your race. As many of my hairs as are caught in your hand, so many demons will be burnt to ashes,” she said, and was consumed in that fire. Her hairs were left in Rāvaṇa's hand. That same Vedavatī was born as Sītā and went to Laṅkā. Sītā's name is ‘Vaidehī’. Vaidehī means one who has no attachment to the body. There are many such subtle secrets in the Rāmāyaṇa.
There is no master like Rāma, no servant like Hanumān, anywhere at all
Hanumān met Rāma only after Sītā had been carried off. He had never seen Sītā before. If such a one is sent to Laṅkā to search for Sītā, whom is he to look for?! He went all through Rāvaṇa's palace in search of Sītā.