The two most fundamental principles of existence or being - are the Absolute & Relative. They're at the core of philosophy, physics, and religion. Although this isn't universally recognized as such, if it's even recognized much at all. Each has it's nature and place. The Absolute's nature, is that it doesn't have anything outside of itself. The Relative's nature, is that it does have something outside of itself. The Absolute is outside the Relative. There is no absolute inside the universe. Searching for one is fruitless. As for the Absolute not having anything outside itself - this means anything. No cause, no space, no time, and not even absolutely nothing. The Absolute stands alone, with no place to be, and it faces inward. There are two reasons for this. 1. If absolutely nothing existed - there wouldn't be absolutely nothing. If nonexistence existed - there wouldn't be nonexistence. Either way it's described - it's simply impossible. 2. "Absolutely nothing (nonexistence) being impossible" - is not the cause of the Absolute. Not even the impossibility - is the outside the Aboslute. Absolutely nothing or nonexistence is impossible - inside the Absolute. If I'm not mistaken, this is logical proof of the Absolute (which is not necessarily its name). As for logical proof of the Relative, and the logic of the interrelationship and interaction between the two, it's best if I refer you an article length PDF at this website. http://www.logicofexistence.com Don't be fooled by the style of formatting you'll find. It was rigorously decided upon, to make the information as universally accessible as possible.