The Varaha Upanishad was composed during the 13th century and considered as one of the minor Upanishads. Here Lord Vishnu’s Varaha Avatara is shown speaking to Ribhu on topics of spirituality, the non-dual truth of the Brahman, power of Kundalini, various Yogas that can liberate man etc. Lord Varaha states that what one aspires to, is part of His own “light”, which is all-encompassing that he alone is Supreme Bliss, that apart from the Atman (soul) there exists no Ishvara or phenomenal world. Those who know their Atman (soul) have no notions of Varna (caste) or Ashrama (stage in life); they see Atman as Brahman, they become Brahman.
Then Lord Varaha goes onto define a jivanmukta yogi:
He who is engrossed in the ways of the world, yet his mind is steady, like ether, is said to be Jivanmukta
His whose mental radiance neither rises nor sets, whose inner state is neither affected by happiness nor by misery inflicted on him, is said to be Jivanmukta
He who is wakeful while remaining asleep, he whose mental alertness is devoid of impressions, is known as Jivanmukta
He who responds to influences such as hatred, fear, love, yet his heart remains pure like Akasha (aether, space), is said to be Jivanmukta
He whose attitude is not be attached to anything, his intellect never clouded whether active or passive, is a Jivanmukta
He who does not shrink out of fear from the world, nor the world shrinks from him, who is free from anger, fear and joy, is a Jivanmukta
He whose mind is not agitated, though participating in the world, who rests in state of calmness and absolute consciousness, no matter what, is known as Jivanmukta.
In mantra shastra Lord Varaha’s upasana can be done to protect a devotee from any kind of mantric attack from enemies, to re-establish control over landed areas, for peace and prosperity, and in some cases to even attain siddhi of dream states.