Confirmed in the realization that from Brahma down to a bunch of grass, I, the Self, alone is/am, one remains free of doubt, pure, quiescent, bereft of the notions of having attained and not attained.
True, the seeker initially thinks of the Self as different from the body, related only to the body. But as he grows in his understanding and sādhanā, the magnitude of the Self also grows. As it is different from the body, it is also unlimited, hence all-pervading indeed. Whatever exists right from Brahmā down to a piece of grass, is but the Self. The locus of experience may be the body, but the subject experienced is everywhere, endless.
Therefore, it is pure. There is nothing to contaminate it. There is no scope to have any kind of doubt. Because that alone is everywhere. Likewise, because of its aloneness, it is ever-peaceful, quiescent. For, only when something else is there, there can be a scope for any kind of emotion or emotional turbulence. In oneness, peace alone reigns.
Lastly, there is no need or occasion to have a goal or aim to achieve. The Self in its infinitude is alone present everywhere, every time. In the context of such a full, constant Presence can there be anything to achieve or attain? The dvandva, namely having attained and not attained, falls like all other dvandvas.
Imagine the freedom, fullness and absoluteness the Knower will reflect and radiate in such a state!