Nothing can cause itself to begin (or come into existence) when it doesn't exist. Things that don't exist can't spontaneously generate themselves into existence. That makes no logical, practical, or scientific sense. Therefore, something (whatever that is) has to be eternal. Something must be, whether matter, energy, something metaphysical, or a being.

Science tells us that the universe is not eternal; it had a beginning. Therefore something outside of nature had to have caused it to come into being. Something made it all start. Looking things over, this "whatever" had to have been eternal, powerful, intentional, outside of nature, and personal.

How it that God is a being that has no beginning but the universe is something that needs a cause and isn't just something that also no beginning?