Descartes: Res Cogitans and the Mechanical Universe
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Descartes: *Res Cogitans* and Mechanism
The First Principle: *Cogito Ergo Sum*
Applying the first rule of his method—to accept only clear and distinct ideas—Descartes concludes that the first glimmer of truth is "I think." From this, he raises the fundamental question: "What am I?"
Descartes' Conception of Substance
To explain the essence of the self, we must understand these concepts:
- Substance: That which needs nothing else to exist (only applicable absolutely to God).
- Mode: That which needs a substance to exist.
- Attribute: The essential characteristic of a substance.
Descartes distinguishes three types of substances:
- The self, whose attribute is thinking.
- God, whose attribute is perfection.
- The world, whose attribute is extension.