Christians at least believe God always is, and many scientific cosmology theories assume something always is as well; even if reduced in size.
Nothingness is explained by Sartre as the absence of something that was; for instance Sartre in a restaurant having coffee perceiving the nothingness in the place were the waiter stood moments before.
One wonders about the emptiness of space and considers that nothingness is the vacuum. Yet people point out that a human body made of atoms has huge spaces of nothingness or emptiness amidst the atoms. If nothingness does not really existing it may be fields that occupy the space. The question is the viscosity of space fields in comparison. Two dimensional particles haven’t made. If mass just seems to exist entangled in the Highs field one might say that something does not exist analogous to the way nothingness does not exist.
If mass is apparent yet not actual and masslessness is the norm then some primordial field may be what is real. Fields that occur in a context that lead to the existence of mass could all be contingent and phases of some initial thought.
Parmenides and Heraclitus updated might argue about the existence of something or nothing instead of perpetual change or never changing.
