That said, one has to realize that absolutely all concepts used in advaita are only symbols or indicators pertaining to what is considered ‘lower knowledge’, and that includes all that is written in the venerable Vedas. At the same time, they, and the expressions containing them, have, directly or indirectly, the supreme reality as their referent.There is a pithy statement in one of the Upanishads: ‘That from which all words fall back failing to reach it, along with the mind’. ‘Higher knowledge’ is beyond the mind (one could even say ‘by consensus’), while necessarily using the latter for verbal transmission. This knowledge or understanding can only be conveyed by what can be called ‘universal intuition’ (or ‘truth of the Heart’), an expression redolent of ‘the Peace that passes all understanding’. And this is the only ‘thing’ – ‘knowledge-experience’- that is unstultifiable; a knowledge that transcends the individual as individual. More on this (knower, witness) following right now.