Gravity is present only in duality. The duality is present only in waking or dream. Waking or dream is present only when the universe is present. Universe is present only when the mind is present. Mind is present only when there is illusion; illusion is present only when there is ignorance. If there is no ignorance, than there is no gravity, no duality, no waking or dream, no universe, no mind. Ignorance is cause of experiencing the duality as reality. The nature of the self is like deep sleep (non-duality). When the soul which is the innermost self-wakes up in its own formless non-dual true nature in the midst of duality through wisdom it is in its own awareness. In self-awareness there is unity in diversity.
Thus just hold mentally the deep sleep as true nature of the soul or consciousness and judge the truth. There is neither waking nor the dream.
The deep sleep is not wisdom because it is still the states of the ignorance. Only on the base of ego or waking entity we call it deep sleep. One has to become aware of the formless, non-dual nature of the innermost self, in the midst of waking experience.
Trying to consciously sleep is yogic Samadhi. Yogic Samadhi is not self-awareness. That is why non-dual sages in the past said sleep and Samadhi are identical. Even with sleeping pill or hemp one can get the same effect of yogic Samadhi. Non-dual wisdom is nothing to do with Yoga because it is based on the false self within the false experience. Non-dual wisdom makes one mentally discard the whole waking experience because the formless self is in awareness of its own true nature.