The text discusses the four varnas (caste system). It is notable for being a sustained philosophical attack against the division of human beings, and for asserting that any human being can achieve the highest spiritual state of existence. The Sanskrit word Vajrasuchi means "diamond pointed needle". The term Upanishad means it is knowledge text that belongs to the corpus of Vedanta literature collection presenting the philosophical concepts of Hinduism and considered the highest purpose of its scripture, the Vedas. The date as well as the author of Vajrasuchi Upanishad is unclear. The Upanishad is attributed to Sankaracharya in the manuscripts discovered by early 1800s. Sankaracharya, also known as Adi Shankara, was an Advaita Vedanta scholar, but given the Indian tradition of dedicating and attributing texts to revered historical scholars, there is uncertainty whether texts attributed to Adi Shankara were actually composed by him or in the 8th-century he likely lived in. What is varna (class, caste)? The Brahmana, the Kshatriya, the Vaishya and the Shudra, are the four varnas. What is meant by Brahmana? Is it his individual soul? Is it his body? Is it based on his birth? Is it his knowledge? Is it his deeds? Is it his rites? —Vajrasucika Upanishad, Verse 2