People often try to give God as an explanation of things like morality, the beginning of the universe, etc. But i don't see how God explains anything or could possibly be an explanation. Its equivalent to "magic" or "pixies" did it. Furthermore there's no reasonable way to show that God is an explanation for anything. Matt DIllahunty made the great point that using God as an explanation is just explaining a mystery by appealing to another, greater mystery. If I say that dark matters exists because of super stuff, or some other undefined label, then you haven't explained a thing. Using God as an explanation is just like using super stuff as an explanation. if you did try to use that as an explanation, then there's no way to prove it because you can't demonstrate a causal link between something as ambiguous as God did it to some unexplained effect.
The God of the bible does not actually claim responsibility for his own existence -or for the existence of that from which he creates (rather, it is suggested that his the mind of everything, and everything his body/changeable garment/changeable environment. In other words, his is that is, that which was and will be).
Likewise, science has no explanation for why things exist in the first place -but only learns how they specifically became one thing from another.
In either case.... As something cannot logically come from
absolute nothing... At some point, everything which became everything else just was -and "always" has been.
From the perspective of general scientific knowledge
thus far, it is believed that things such as self-awareness, identity, creativity, etc., naturally develop/evolve. It is also known that certain things are impossible without self-awareness, identity, creativity, etc. -that they are required to allow for and produce things not otherwise possible.
There is no reason to believe this is not the case on an all-inclusive scale. In other words, "everything" must first have become capable of knowingly producing that which was previously impossible.That which now exists must always have been generally possible, but all things must be preceded by that which makes them specifically possible.
We do not see the big picture, so it seems thus far that God is not necessary -because processes are essentially automated -but it is the nature of that which is produced which would indicate self-awareness, forethought, intent, purpose, intelligence, etc., etc., rather than the process -and extremely complex automated processes should certainly not be assumed to be indication of a lack of such.