In Hinduism, Maya is to be seen through, like an epiphany, in order to achieve moksha (liberation of the soul from the cycle of samsara). Ahamkar (ego-consciousness) and karma are seen as part of the binding forces of Maya. Maya may be understood as the phenomenal Universe of perceived duality, a lesser reality-lens superimposed on the unity of Brahman. The samskaras of perceived duality perpetuate samsara. Maya may also be visualized as a guise or aspect of the Divine Mother (Devi) concept of Hinduism. In the Hindu scripture Devi Mahatmyam, Maya covers Vishnu's eyes in Yoganidra (Divine Sleep) during cycles of existence when all is resolved into one. By exhorting Mahamaya to release Her illusory hold on Vishnu, Brahma is able to bring Vishnu to aid him in killing two demons, Madhu and Kaitabh, who have manifested as thoughtforms from Vishnu's sleeping form. Maya is a lesser reality that must be overcome so that one is able to realize their true Self.