Vajrasuchika Upanishad

It is classified as one of the 22 Samanya Upanishads, and identified as a Vedanta text. It is attached to the Samaveda. 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 text is structured as a single chapter in a prose form. It opens with verse 1 asserting that it describes the "Vajrasuchi doctrine", which destroys ignorance, condemns those who are ignorant and exalts those with the divine knowledge. There is no other way to attain the state of Brahmana, states Vajrasuchi Upanishad, other than meditating on the non-dual Brahman (ultimate reality and truth), with the Atman as the Satcitananda – truth consciousness-bliss.