The immediacy of mystic experience simply means that we know God just as we know other objects. God is not a mathematical entity or a system of concepts mutually related to one another and having no reference to experience.
It's the story of an American who wants to become a dictator and goes to Europe with a sidekick to interview various Fascists to find out how the Nazis and Mussolini got into power.
I can plod. I can persevere in any definite pursuit. To this I owe everything.