Aham Brahm has me. It means, I am Brahman and Brahman is I. And Brahman, the ultimate reality is nothing but I. Other than as an object to me is not the ultimate reality. So, Brahman is nothing other than you. You are nothing other than Brahman. Atma Bhaavina. In this way, it has to be certain. This is a real reason. Real reason why Brahman is, our ultimate reality is hidden, is because it is not an object. Separating does not mean physically separating. But it is by the way of enquiry. After all, what is Dhrkdrishya Viveka