St. Anselm's approach was to define <answer>God</answer> as, "that than which nothing greater can be conceived". Famed pantheist philosopher Baruch Spinoza would later carry this idea to its extreme: "By <answer>God</answer> I understand a being absolutely infinite, i.e., a substance consisting of infinite attributes, of which each one expresses an eternal and infinite essence." For Spinoza, the whole of the natural universe is made of one substance, <answer>God</answer>, or its equivalent, Nature. His proof for the existence of <answer>God</answer> was a variation of the Ontological argument.
Spinoza believed that the universe was made up of one substance which is?
God