Bhrama (Hinduism)
Bhrama (Sanskrit: भ्रम), in the context of Hindu thought, means – error, mistake, illusion, confusion, perplexity. But, it literally means – that which is not steady; and refers to error etc., caused by defects in the perceptive system. The seeing of snake in a rope in darkness, silver nacre in moonlight, water in a mirage on a hot day and a person in a stump of tree are four classic instances quoted in Vedantic texts. "Bhrama" is a mistake, it is a confusion about one object which exists for another object which does not exist, it merely refers to the  fallibility of human perception. Human nature is ordinarily afflicted by - भ्रमप्रमादविप्रलिप्साकरणापाटवदोषाः – i.e. "bhrama" (false knowledge or mistakes), "pramāda" (inattention or misunderstanding reality), "vipralipsā" (cheating propensity) and "karaṇa-a-pāṭava" (imperfection of the senses) are four major mind-faults which mislead human beings and do not permit right perception and cognition. Amongst these, the knowledge which is of the nature of "bhrama" is the direct thought-wave of "avidya". And, the texts speak about there being five theories of illusion or erroneous perception – "Ātmakhyāti" (Yogacara theory of subjective apprehension), "Asatkhyāti" (Madhyamaka theory of the nonexistent), "Akhyāti" (Prabhākara’s theory of non -apprehension), "Anyathākhyati" (Nyaya theory of misapprehension) and "Anirvacanīyakhyāti" (Advaita Vedanta theory of apprehension of the indeterminate), developed by five schools of thought. The Vedantic texts reveal the Self as Pure Consciousness; they reveal the Self as the ever blissful witness who is neither the enjoyer nor the enjoyment or the object of enjoyment. The enjoyer is Chidabhasa or Jiva, the sheath of the intellect, a product or manifestation of Maya, not transcendentally real and subject to change. Vidyaranya in his Panchadasi (VII.9-10) explains:- Swami Swahananda in his commentary tells us that Kutastha, conventionally identified with ego, is not the  object of identification for it is incapable of being associated with ego. According to Shankara, "atma-anatma adhyasa", the so-called locus of superimposition, is a mispresentation or "proksha-aproksha bhrama". Panchapadika pf Padmapada interprets "purovasthitava" (the object in front) as contact with the visual sense, whereas Ratnaprabha of Niścalakara relates it with sense-contact; the former explains that a non-object can become an apparent object and the latter explains that Shankara in no way considers the said locus to be complete and conclusive. "Saguna" (with attributes) worship leads to a typical illusion in as much as the devotee  mistakes physical or mental images for the formless God; it is of the nature of the "Samvadi-bhrama" that finally leads to the realization of Nirguna Brahman, the endless pursuit after sense-objects is the "Visamvadi-bhrama". But, the cumulative subtle awareness of "bhrama" need not necessarily result in the awareness of Maya because owing to the latter either one wakes up from a dream or goes on dreaming forever. "Svarūpa-bhrama" (illusion about spirituality) is one of the four major "anarthas" (useless, meaningless, disastrous, wrongdoings) and is said to be of four kinds – "sva-tattva" which is illusion about  one’s own spiritual identity, "para-tattva" which is illusion about the spiritual identity of the supreme absolute truth, "sādhya-sādhana-tattva" which is illusion about the spiritual means and the object gained, and "māyā-tattva" which is illusion about the Lord’s external energy. These "anarthas" are required to be uprooted in order to develop "niśṭa" (devotion). But, "bhrama" is not an "āropa" (imposing of, imputation, figurative substitution) which is an āhārya (wilfully caused in spite of falsity) cognition. The Yoga School of thought adopts the "Anyathākhyati" theory of misapprehension of the Nyayas for dealing with "bhrama", which theory  is based on the premise that "bhrama" is thinking of something as that which it is not, like attributing the characteristics of Prakrti to Purusha and vice versa. In Ayurveda, "bhrama" refers to Vertigo, a discreet disease due to Vata prakopa and Pitta prakopa which shows six distinct stages, and is curable.