When we enter most deeply into ourselves, we become aware of a very basic fact presented to us: we are aware of our own self (ego, I, center of consciousness) as being distinct from our bodies and from any particular mental experience we have, and as being an uncomposed, spatially unextended, simple center of consciousness. In short, we are just aware of ourselves as simple, conscious things. This fundamental awareness is what grounds my properly basic belief (one rational to have that is not based