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Rudra bhakthya thu krishnena jagat vyaptham mahathmana, In Mahabharata, Anushasana parva Bishma pitamaha says to Yudhistira: And, verily, he who, knowing this, performs the Purushamedha, or who even knows this, overpasses all beings, and becomes everything here." "Purusha Narayana desired, 'Would that I overpassed all beings ! would that I alone were everything- here (this universe) !' He beheld this 'five days' sacrificial performance, the Purushamedha and took it and performed offering therewith and having performed offering therewith, he overpassed all beings, and became everything here. "puruṣo ha nārāyaṇo'kāmayata atitiṣṭheyaṃ sarvāṇi bhūtānyahamevedaṃ sarvaṃ syāmiti sa etam puruṣamedham pañcarātram yajñakratumapaśyattamāharattenāyajata teneṣṭvātyatiṣṭhatsarvāṇi bhūtānīdaṃ sarvamabhavadatitiṣṭhati sarvāṇi bhūtānīdaṃ sarvam bhavati ya evam vidvānpuruṣamedhena yajate yo vaitadevam veda" ( Sathapatha Brahmana 13:6:1:1) Sathapatha Brahmana of Shukla yajurveda describes how Narayana Rishi became one with Purusha. Those who know Purusha will become, verily, like Purusha, the self of all beings. This non-dual knowledge made Narayana Rishi merge with Lord Shiva. He was the first Human Rishi to realise the universal oneness and oneness of Atman in all beings. By the grace of Lord Shiva, Narayana Mahrshi got the divine vision of Purusha. His counterpart Nara Maharshi was born as ' Arjuna '. This Narayana Maharshi was later incarnated as Devaki putra Sri Krishna during Dwaparayuga. Narayana Maharshi was the 'Mantra Drashta' (seer) of the hymn. Purusha Sukta appeared first in Rig Veda 10.90.
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