In plain words
Who are the sattva, rajo and tamo guṇas that he wedded? Kausalyā, Sumitrā, Kaikeyī. This body is the Daśaratha who wedded these three guṇas. Rāma, Lakṣmaṇa, Bharata and Śatrughna, born to them, are the four puruṣārthas: Dharma, Artha, Kāma and Mokṣa. Rāma, Dharma itself in visible form, is sāttvic. Since He has sattva guṇa, He is the embodiment of Dharma. The puruṣārthas called Artha, Kāma and Mokṣa become worthwhile only when they follow Dharma. That is why Lakṣmaṇa, Bharata and Śatrughna kept following Rāma. Doing meritorious deeds, they kept nourishing good qualities. In our four puruṣārthas we must develop holy feelings full of sacrifice. Rāma could break Śiva's bow only by nourishing such good qualities. This bow of Śiva is nothing but the delusion that envelops the mind. One who had risen above delusion. Who had conquered it. The king of Mithilā could find no one. He was Vaidehi. Who is Vaidehi? The one whose form is the Ātma. Vaidehi means one whose qualities carry no vāsanās of the body. Only by mastering delusion could Rāma win Sītā, who is Jñāna. Sītā is filled with Brahmajñāna. Where was Sītā found? She was found in the earth. So we need not try to search for Brahmajñāna somewhere far off. We can gain it in Prakṛti itself.
Sītā is earth-born. Sītā arose from the earth. That is, Brahmajñāna arises in the earth itself. After Brahmajñāna had come, Rāma entered the forest called life. Who was the cause of entering this forest? Daśaratha alone, who had wrapped himself in rajo guṇa, was the cause of it. By following this body they entered the forest called life. Here, in the forest of Brahmajñāna, the resolves called desires came in. Brahmajñāna goes only with renunciation, never with attachment. Only because attachment arose at the sight of the golden deer did separation come from Dharma, from Satya, that is, from Rāma. So we must regard attachment as a great disease to Brahmajñāna. Rāma, the embodiment of Dharma, did many sādhanas to regain the Brahmajñāna He had lost. Searching and searching, He reached the mountain called Ṛṣyamūka. Ṛṣyamūka is the very place where all attachment is given up. There He made friends with Sugrīva, who is Viveka, and with Hanumān, who is courage. Once friendship was formed between the two of them, Rāma, whose heart is Dharma, set about solving their problems. Enmity grew between Vāli, who is Adharma, and Sugrīva, who is Viveka. Vāli defied Sugrīva, seized the kingdom, sent him into exile in the forest, tormented him in many ways, made friends with the wicked Rāvaṇa and drove his own brother away.