  In the Short Treatise Spinoza develops ideas that will come to a full articulation later on in the Ethics, such as the idea that, strictly speaking, there are only two attributes through which we can properly come to have knowledge of God—Thought and Extension. However, unlike in the Ethics, he does not simply dismiss the more traditional attributes such as omnipotence, eternality, immutability, and infinity. To maintain some sense of these traditional divine attributes, Spinoza explains that they are not attributes strictly speaking, but rather propria of God. This is stated first clearly in the first footnote to Chapter III (“How God is the Cause of All Things”):