To the degree that we humans are capable of understanding, it all must have been created at the same time.No, that's not quite right. I said the meaning of the account was probably lost but the account itself was likely intact. The account in question is an allegorical account of an historical event, the creation of existence. In that allegorical account they sequenced matter and energy being created before light. Which I found amazing. That account also said that everything wasn't created all at once. That what they saw was the result of a process. And lastly the account tells us that man arose from that creation. All in allegorical fashion mind you.
or
It always existed.