在自身之中/在他物之中的划分

Axiom 1: Everything that exists, exists either in itself or in something else. Axiom 2: That which cannot be conceived through anything else must be conceived through itself. Together, these axioms enforce an exhaustive ontological partition — nothing escapes the substance/mode divide.

• I.Ax.1
• I.Ax.2
• I.Def.3
• I.Def.5