The wise who separate the atman from the sensory functions become immortal.
The eye cannot approach It, neither speech nor mind. We do not therefore know It, nor do we know how to teach It. It is different from what is known and It is beyond what is unknown. Thus we have heard from our teachers who taught us
I do not think I know It well. Nor do I think that I do not know It. He knows It who knows that It is other than the unknown and the known. The teacher’s reply is the following. He knows who knows It not. He knows It not who knows. It is unknown to the one who knows. It is known to the one who does not know.