There is however a fourth stage, distinct from these three; (Vishva, Taijasa and Prajna); it is named Turiya. This stage cannot be described in words or even imagined by the mind, for it is beyond both Buddhi and Manas. The experience is falteringly described as Shantam Shivam Advaitam; that is all. It is peace, it is Grace. It is One-ness. The mental agitations are stilled and so there is no more mind. It is the conquest of the mind, its negation, the A-manaska stage. What a victory it is! For in deep sleep, the mind is latent; in dream, the mind is restless with agitations; in the waking stage, it is active and motivating. In all three stages, Truth remains unknown. The objective world is but a delusion of the agitated mind, the super-imposition on the rope of a non-existent snake. The world is not born, nor does it die; it is born when you are ignorant; it dies when you become wise. (UV, p. 26)

When the seer and the seen are both the same, the joy is described as that of the fourth stage, the Turiya stage. Beyond this, the Atman is certain to be reached. By dwelling constantly on the Atma and its reality, the attachment to the world will fall off. The Sadhana must be without break.  (UV, p. 75)