Above that unmanifest reigns the superior eternal Unmanifest, which does not vanish while all beings go on perishing.
In spirituality, direct personal experience is the first and last ground for all findings. How well does Krishna speak and describe matters, which are experiential to one and all.
From the unmanifest rises the manifest, as instanced by our sleep and wakefulness. Both are mutual and transitory. Evidently the two subsist on and are caused by something besides. We ascribe wakefulness and sleep alike to the ‘I’. ‘I’ is the waker; ‘I’ is the sleeper too.
Due to that ‘I’ alone, can wakefulness and sleep be. All three states, including dream, are predicates of the ‘I’.
When wakefulness transits, what survives to bring sleep, and vice versa? The states alone transit, but not ‘I’, their ground. This is how we say ‘I am wakeful, I slept, and I dreamt’. The “I” is obviously above the three. Every day when wakefulness recedes, subsequently sleep also, ‘I’ endures intact. This is every one’s direct experience and verdict. Visible creation is a display of wakefulness alone!