God told me that your arguments are all worthless sophistry. Since His ways are above our ways and His Mind is unsearchable, you have no way to dispute either of the assertions (that I received this divine communication, or that it is an accurate evaluation of your comments) contained in the previous sentence.
Game, set, match.
We cannot know God positively, in Himself. However, we can know what God is not and can therefore know certain things about God through natural reason, such as the fact that He is One, Good, True, Beautiful and Being. God is of an entirely different category than human beings, and as such, we can only express truths about Him by anaology or negatively. Nevertheless, the knowledge is certain.
We can also know God through revelation.