In plain words
Sweeter than sugar, more delicious than the essence of curds, more delicious far than the richest honey; spoken by the lips again and again, it grows so very sweet it seems nectar itself; so, every day, dwell on it well in your minds: the name of Rāma!
The Veda is endless, matchless, without a second. The Rāmāyaṇa is the very essence of the Veda. To hold up an ideal for mankind, the Ṛgveda, the Yajurveda, the Sāmaveda and the Atharvaṇaveda, all four Vedas, took on four forms, Rāma, Lakṣmaṇa, Bharata and Śatrughna, and moved about in this physical world. The Ṛgveda is the very form of mantra. Rāma, the Ṛgveda in form, ruled over the people. Holding that Rāma alone was the support of his life, Lakṣmaṇa always stood at Rāma's side as His companion and followed in Rāma's footsteps. If Rāma was the form of the mantra, Lakṣmaṇa became the seer of the mantra. Bharata took as his support the nirguṇa form that is the name of Rāma, and for fourteen years kept his thoughts on Rāma. Believing that the name of Rāma itself was the support of his life, he taught it to all, practised it himself and experienced Ānanda. So Lakṣmaṇa was a worshipper of the saguṇa, Bharata a worshipper of the nirguṇa. And Śatrughna conquered his senses, bowed his head to the commands of Rāma, Lakṣmaṇa and Bharata, and gave all his time to their service alone.
The four Vedas themselves came down as Rāma, Lakṣmaṇa, Bharata and Śatrughna
Teaching the world the ideals of Rāma, Lakṣmaṇa, Bharata and Śatrughna, Vasiṣṭha and Viśvāmitra proclaimed to the world that they were the very embodiments of the Vedas. They said these were born in his house only through the fruit of King Daśaratha's merit. Teaching his disciples about the Vedas, Viśvāmitra would say: “My dear ones! All four Vedas have come down as Rāma, Lakṣmaṇa, Bharata and Śatrughna, the children of King Daśaratha, and are giving the world its ideal.”