TURIYA

Turiya, according to Vedanta, is not a state of consciousness but consciousness itself.  It is the consciousness of the Atman.  It is a witnessing consciousness of which the individual is normally not aware.  The three usual states of consciousness, that is, the state of waking (jagrata), the state of dreaming (svapna), and the state of dreamless sleep (susupti) have turiya underlying and transcending them.