I am perfect.  How do I know I am perfect?  Because I say I am perfect.  Because I just know that I am perfect.  Because anyone who truly knows what perfect is will know that I am perfect.  Look, I even have a dictionary that has the word “perfect” with my picture included in the definition.  What, your dictionary doesn’t have that?  Well, you just have the wrong dictionary then, because it is so obviously true.  I have the answer to all your questions, just because I am perfect.  When will you stop doubting and start believing?  I admonish you to prove me wrong, but you can only use the correct materials (like my dictionary) to do so.

Doesn’t make sense, does it?  Of course not.  Then how does it supposedly work for explaining God?