 In Part Two, Spinoza turns to the nature of the human being. The two attributes of God of which we have knowledge are extension and thought. This, in itself, involves what would have been an astounding thesis in the eyes of his contemporaries, one that was usually misunderstood and vilified. When Spinoza claims in Proposition Two that “Extension is an attribute of God, or God is an extended thing”, he was almost universally—but erroneously—interpreted as saying that God is literally corporeal. For just this reason, “Spinozism” became, for his critics, synonymous with materialism.