DESCRIPTION OF BRAHMAN
The Upanishads describe Brahman  as Supreme Self, or Cosmic Self, or Ultimate Reality, or Absolute Existence, or the infinity of infinitude that is the sole cause and essence of all existence. It is Satyam-Jnanam-Anantam Brahma , or Truth-Knowledge-Infinity ( Taittiriya Upanishad, 2.1.1 ; Sat-Chit-Ananda , or Existence-Consciousness-Bliss ( Tejobindu Upanisha, 3.11 ); and Vijnanam-Anandam-Brahma , or Knowledge-Bliss-Brahman ( Brihadāranyaka Upanishad, 3.9.28(7) . That great, birthless Self is undecaying, immortal, undying, fearless and Brahman . Brahman  is indeed fearless. He who knows It as such becomes the fearless Brahman ( Brihadāranyaka Upanishad, 4.4.25 ).  Brahman  is also described as Nirakara  (formless), Nirvisesa  (impersonal), Nirguna  (attributeless), Nirvikalpa  (non-duality), Adrishta  (invisible), Akarta  (non-doer), Paramatma  (Supreme Self), and various other descriptions indicating Its completeness, fullness, imperishability, infinity, omnipotence, omniscie...