I am a theist, what do you think of my proof for God existing?

[GUBU]

Now you will continue with saying that it is circular reasoning.

What is wrong with circular reasoning?

Circular reasoning is the process whereby you use the claim to show the truth of the proof, and you show the truth to show the veracity of the claim. When you engage circular logic in an argument you never introduce external and independently verifiable evidence to show you are right. An example is, "god is real because the bible says so, I know that the bible is true because god told me so."

That is why it is wrong, because it is making a claim with no attempt to show the claim is right, you are asking us to accept you are correct simply because you say you are.

that is what we do in our mind, otherwise we will not even know in our mind what we are thinking about.

No we don't engage in circular reasoning on most topics. For example when I wanted to know the score of the Chelsea United match last Sunday, I didn't make up a score and assume it was true because my mind thought the score up, I looked up a newspaper report and found out that the score was 4-0 to Chelsea.