i agree that much that was once explained only by reference to deity is now understood in science,the beginning though is not so explained.everything that has a beginning must have a sufficient cause.if that cause is natural,it too would require sufficient cause.therefore that cause must be supernatural/spiritual.

Terrible logic. Utter non sequitur. You try to explain something that is (admittedly) difficult to explain by inventing something that is itself impossible to explain, and, worse, for which you have no evidence. Of all the answers you could come up with for your conjecture, you pick what is by far the most improbable.