Krishna defines the absolute limits of human perception regarding the soul. He calls the soul 'avyakta' (unmanifest/invisible to the senses), 'acintya' (inconceivable/beyond the mind), and 'avikārya' (immutable/beyond physical change). Because the soul operates completely outside the jurisdiction of human senses and human thought, grieving for its 'loss' is a logical error. Therefore (tasmād), knowing this, Arjuna should not lament (nānuśocitum arhasi).