Does the Cause of the World Exist?

If you say, yes, god is the cause of the world, we are using god as a proper name, then god exists. Will not be a statement that meaning. As for the phrase existent round square, i should say that has no meaning at all. I mean, there is a being whose essence involves existence, although we don't know that essence. We only know there is such a being. Yes, certainly, if anybody saw god, he would see that god must exist. But ould not be willing to argue the existence of god simply from the idea of his essence. And so this, again, goes back to this basic worry that russell has, that