Descartes, Rene - Thinking substance and extended substance
Type of Spiritual Experience
Substance = Spirit
Thinking substance = Function and system
Extended substance = Form
A description of the experience
Rene Descartes – Key Philosophical Writings
.. I distinguish all the objects of our knowledge into two species; the first contains all things which have an existence; the second all the truths which have no existence outside our thought...
[in effect] I do not observe more than two ultimate classes of things – the one is intellectual things, or those of the intelligence, that vis, pertaining to the mind or to thinking substance, the other is material things, or that pertaining to extended substance....