Good. Hopefully things will be become clearer and clearer.
But before I go on, I should establish the incontrovertible first principle of ontology, sometimes referred to as
the principle of eternality.
The First Principle of Ontology or The Principle of Eternality:
1. Something exists rather than nothing.
2. Existence cannot arise from nonexistence.
3. Hence, something has always existed.
Existence arising from nonexistence would be absurd; indeed, a state of nonexistence in and of itself is an absurdity.
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Scientifically, we have known for sure since the early 20th Century that the Universe is necessarily moving forward in time to a relatively greater and greater state of entropy (a greater and greater state of relative chaos or disorganization). This increasing state of entropy is routinely referred to as the arrow of time.
But let's go back a few centuries, to a time in history before we knew this scientifically.
Aside from the fact that their respective revelations told them that the Universe began to exist in the finite past, when at time-0 God ordered or spoke or willed the Universe into existence: how did the classical theist thinkers of Judaism, Christianity, and Islam know that the Universe (the spacetime continuum of mater and energy) began to exist in the finite past, i.e., could not be the eternal existent?