
Part I: Concerning God — God and Nature form one substance
Reality consists of a single infinite substance, which can be called God or Nature (Deus sive Natura). Everything that exists is a modification or expression of this substance, existing necessarily rather than by divine decree. Mind and matter are not separate creations, but two of infinitely many attributes through which the ultimate reality expresses itself. Free will in the traditional sense is an illusion, as every cause stems inexorably from the nature of the whole.

