Tomorrow and tomorrow...

I...should have died hereafter. There is no if and or but about it. My death is the one, the one that ends the world. I feel this to be true. I may be who I pretend to be. I may live in a box with no corners, thinking myself wiser than I am, but...what am I? And before you ask yourself that same question, before I have a chance to ask the same...I know. I know.