states that for proper understanding all texts must be examined in their entirety and then their intent established by six characteristics, which includes studying what is stated by the author to be his goal, what he repeats in his explanation, then what he states as his conclusion and whether it can be epistemically verified. Not everything in any text, states Shankara, has equal weight and some ideas are the essence of any expert's textual testimony. This philosophical difference in scriptural studies helped Shankara conclude that the Principal Upanishads primarily teach monism with teachings such as Tat tvam asi, while helping Ramanuja conclude that qualified monism is at the foundation of Hindu spirituality. Comparison with other Vedānta schools Ramanuja's Vishishtadvaita shares the theistic devotionalism ideas with Madhvāchārya's Dvaita. Both schools assert that Jīva (human souls) and Brahman (as Vishnu) are different, a difference that is never transcended. God Vishnu alone is independent, all other gods and beings are dependent on Him, according to both Madhvāchārya and Ramanuja. However, in contrast to Madhvāchārya's views, Ramanuja asserts "qualified non-dualism", that souls share the same essential nature of Brahman, and that there is a universal sameness in the quality and degree of bliss possible for human souls, and every soul can reach the bliss state of God Himself. While the 13th- to 14th-century Madhavāchārya asserted both "qualitative and quantitative pluralism of souls", Ramanuja asserted "qualitative monism and quantitative pluralism of souls", states Sharma. Ramanuja's Vishishtadvaita school and Shankara's Advaita school are both nondualistic Vedānta schools, both are premised on the assumption that all souls can hope for and achieve the state of blissful liberation; in contrast, Madhvāchārya believed that some souls are eternally doomed and damned. Shankara's theory posits that only Brahman and causes are metaphysical unchanging reality, while the empirical world (Maya) and observed effects are changing, illusive and of relative existence. Spiritual liberation to Shankara is the full comprehension and realization of oneness of one's unchanging Ātman (soul) as the same as Ātman in everyone else as well as being identical to the nirguna Brahman. In contrast, Ramanuja's theory posits both Brahman and the world of matter are two different absolutes, both metaphysically real, neither should be called false or illusive, and saguna Brahman with attributes is also real. God, like man, states Ramanuja, has both soul and body, and all of the world of matter is the glory of God's body.