Since I’ve been pondering Rene Descartes lately, and before reassigning him to the dusty storage bins of my mind, I would like to poke at his famous quote, “I think therefore I am”. Easily one of my favorites.
Descartes began his philosophy by doubting everything in order to figure out what he could know with absolute certainty.
Although he could be wrong about what he was thinking, it was undeniable that he was thinking.
Upon the recognition that “I Think”, Descartes concluded that “I Am”.
On the heels of believing in himself, Descartes asked, “What am I?” His answer: A thinking thing (res cogitans) as opposed to a physical thing extended in three-dimensional space (res extensa).
So, based on this line of reasoning, Descartes knew that he existed, though he wasn’t sure if he had a body.
It’s a philosophical cliff-hanger; You’ll have to read his ‘Meditations’ to see how it ends.