Spinoza's Argument

This writing consists of 33 propositions, the Ethics begins with definitions (158), axioms (159) and then Spinoza begins to discuss the propositions. I noticed that the statements for each proposition becomes longer as the list goes on. The first three propositions reference back to the definitions to attempt to prove that the point that is being made is true (159). However, as Spinoza continues to discuss each proposition by referring back to the definitions as well as the previous propositions in such a way to incorporate everything into the point. Spinoza uses the first part in his ethics writing to discuss the nature of God and essentially how nature and God are the same.
To begin, all substances are unique from the other and there are