thath thwam asi

thath thwam asi is  a maha vakhya from samaveda. thath= that, thwam=you, asi= is.{this is the word meaning}literally it means u are that brahman. now what is common between thath the brahman and thwam(u) is  asi  shabdha. asi  literally means  is. which means existence. therefore    u are dependent on existence and brahman(thath) also depends on existence. since both of them  depends on  asi. what is real is conscience or asi. since both brahman  and u are  dependent on conscience, this real. conscience always exists  even if jeeva dies. brahman never dies. . jeevatwam is due to our avidhya that conquers us and  we feel we are a limited entity. in reality both jeeva and brahman  is  same since consciencesness is the reality. maha vakhya makes u to understand that u are really brahman. thus mahavakhya leads u to supreme reality the brahman