So, you have no reason to believe that the Primal Cause exists. In that case, you have all the reason in the world to believe that you caused yourself to exist; did you? If your answer is positive, how could you have caused yourself to exist if you did not exist? On the other hand, how could you have caused yourself to exist if you had to exist to do so? To the first instance, you could not have caused yourself to exist because you did not exist to do so. And to the second instance, you could not have caused yourself to exist because you already existed and there was no need to further cause yourself to exist. What is then the solution to this paradox? Someone who preceded you caused you to exist aka your parents. And your parents, their parents, and their parents? Now, you know that I am talking about generic causality. Now, if you go back to the first couple of parents, who caused them to exist? See, it was not so hard. I have proved to you the existence of the Primal Cause, aka the Creator of the Universe. Baruch HaShem!