As per Hindu scriptures, Brahma is said to have created four sons – Sanaka,Sanatana, Sanandana and Sanat Kumara. Sanata Sujata is another name of Sanat Kumara. The four sons were created when his wisdom was pure and pristine, devoid of any attachment.
As per Linga Purana and Shiva Purana, Sanat Sujata is the most important among the four sons.
He is mentioned widely in the Mahabharata. He enlightens Sage Vyasa, Bhisma, Dhritarashtra and Maharaja Prithu. Some of the popular stories like that of Tulsi, Andhaka etc are narrated by Sanat Sujata.
The Mahabharata record his question answer session with King Dhritarashtra in the Udyog Parva under the section entitled Vidura Niti.
The dialogue that happened between Dhritarashtra and Sanat Sujata in the Mahabharata is famous as Sanatsujatiya – an independent treatise on Brahmavidya.