Just a sample:
"Then, who, verily is the Brahmana? He who, after directly perceiving, like the amalaka fruit in the palm of one's hand, the Self, without a second, devoid of distinctions of birth, attribute and action, devoid of all faults such as the six infirmities, and the six states, of the form of truth, wisdom, bliss and eternity, that is by itself, devoid of determinations, the basis of endless determinations, who functions as the indwelling spirit of all beings, who pervades the interior and the exterior of all like ether, of the nature of bliss, indivisible, immeasurable, realizable only through one's experience and who manifests himself directly (as one's self), and through the fulfillment of his nature, becomes rid of the faults of desire, attachment, and endowed with the quallties of tranquillity, etc., and of the states of being, spite, greed, expectation, bewilderment, etc., with his mind unaffected by ostentation, self-sense and the like, he lives. He alone who is possessed of these qualities is the Brahmana. This is the view of the Vedic texts and tradition, ancient lore and history. The accomplishment of the state of the Brahmana is otherwise impossible. Meditate on Brahman, the Self who is being, consciousness and bliss, without a second, meditate on Brahman, the Self who is being, consciousness and bliss without a second This is the Upanishad."
Vajrasūcika Upanishad
Principal Upanishads by Dr. Sarvapalli Radhakrishnan
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