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The character of Shri Krishna is described in detail in the Kurma Purana, Brahma Vaivarta Purana, Harivamsa Purana and Shrimad Bhagavata.
The Chandogya Upanishad refers to Krishna as the son of Devaki. He studied near the great Angiras Rishi. Shrimad Bhagavata describes Krishna as the Supreme Brahman. He is unique in six qualities: knowledge, peace, strength, wealth, power and brilliance. His life in various forms has been depicted in literature. The Acharyas of the Vedic tradition have portrayed the character of Shri Krishna from their perspective. Jayadeva, Vidyapati, etc., embraced the loving form of Krishna and gave rise to Krishna Bhakti. Poets like Surdas and others of the Ashtachap group analyzed Krishna's childhood and youth in detail. The deities of the Ritikal poets were Shri Krishna, and they created a considerable amount of literature in the form of songs and free verses. Even in the modern era, scholars of the Vedic tradition have written many books like Priy-Pravas, Krishnavatar, etc.
The Ghatajataka in Buddhist literature describes the character of Shri Krishna. Although there are significant differences in the sequence of events and names, the essence of the Krishna story is similar.
In the Jain tradition, Shri Krishna is Vasudeva, a perfect being, noble, virtuous, extremely compassionate, loving to the surrendered, bold, courageous, humble, devoted to his mother, a great warrior, righteous, dutiful, intelligent, ethical and brilliant. The description of his brilliant personality in the Samavayanga is amazing. He is the ruler of the three worlds, the Ardhachakra. His body had one hundred and eight auspicious marks. He was like a bull among men and like Indra, the king of the gods. He was a great warrior. He fought three hundred and sixty battles in his life, but he was never defeated. He had the strength of twenty lakh Ashtapadas. But he never misused his power. Unlike the Vedic tradition, the Jain tradition does not consider Vasudeva Shri Krishna to be a part of God or an avatar. He was the best ruler. From a material perspective, he was the greatest ruler of that era. But because he was Nidankrit, he could not progress beyond the fourth Gunasthan from a spiritual perspective. He was a devout follower of the Tirthankara Arishtanemi. Arishtanemi was older than Shri Krishna in terms of age, but older than him in terms of spirituality. (One was a Dharmaveer, the other a Karmaveer, one was inclined towards renunciation, the other towards action). Therefore, whenever Arishtanemi visited Dwarka, Shri Krishna would go to worship him. His glorious and brilliant form is revealed in the Agamas like Antakrid Dasha, Samavayanga, Jnatadharmakatha, Stananga, Nirayavali, Prashnavyakaran, Uttaradhyayana, etc. There are many incidents related to his life in the commentary literature of the Agamas, in the Niyukti, Churni, Bhashya and Tika texts. The leading thinkers of both the Shwetambar and Digambar traditions have written more than a hundred books based on the incidents of Krishna's life. In terms of language, these compositions are in Prakrit, Apabhramsha, Sanskrit, Old Gujarati, Rajasthani and Hindi.