If Nirguna Nirakara Brahman is avyakta (unmanifested and formless) and cannot be seen or percieved by the mind or senses, then how does the Advaitin realize IT in deep meditation / samadhi / jivan mukta state, and how does he know for sure that its Brahman he's realizing and not something else?
We are often given the example that when the salt doll went to measure the ocean, the doll itself became the ocean. In other words, when we use our mind (as a tool) to look inwards in deep meditation, to realize the original Self (Brahman/Atman) we lose our individuality and become One with IT and remain silent. And after this experience, when we come down to dualistic reality, we fail to explain our experience, because the knower vanishes and becomes one with the known during Self-realization.
But then, if i fail to explain my experience, how am i to know for sure that the thing i experienced during Self-realization is actually Brahman and not something else. And most importantly how do i experience THAT which is avyakta?