Eternal oblivion (also referred to as non-existence or nothingness)[1][2] is the philosophical, religious, or scientific concept of one's consciousness forever ceasing upon death.
Pamela Health and Jon Klimo write that this concept is mostly associated with religious skepticism, secular humanism, nihilism, agnosticism, and atheism.
[3] According to most modern neuroscience theories of consciousness, the brain is the basis of subjective experience, agency, self-awareness, and awareness of the surrounding natural world.
[7] Cicero, writing three centuries later in his treatise On Old Age, in the voice of Cato the Elder, similarly discussed the prospects of death, frequently referring to the works of earlier Greek writers.
[15] Thomas Clark, founder of Center for Naturalism, wrote a paper titled "Death, Nothingness, and Subjectivity" (1994).
When some imagine their deaths (including the non-religious), they project themselves into a future self which experiences an eternal silent darkness.