I Think , Therefore I am .

“ If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things”.                               
                                                                                               - Rene Descartes

The guy was trying to figure out if he could prove that he existed, cause it was trendy then to try to prove what all existed and whether or not anything actually existed at all. They had a lot of time on their hands.

He decided that the proof of his own existence was in the observation that he thought - had a mind that could think. So he decided that because he could think, he must exist.

“ I think. Therefore I am"

On a side note, this very guy once walked into a bar and ordered a drink. Bartender brought him a drink. After a while the barkeep noticed his glass was near empty. Another drink, Mr. Descartes?

Urmmph what else that I can describe more from the phrase yeah ? ahaaaa…I think that Descartes identified that something exists, but he may have been in error as to what that 'I' is. All he knew was that thoughts showed up in his mind, and he claimed authorship over those thoughts, assuming the human was the source of them, and therefore the existent entity. 

It can be observed that thought arise spontaneously. There is no one choosing what thoughts to think. It has also been demonstrated that brain motor activity can begin before a conscious choice is even made, implying that there really is no chooser.

Many spiritual systems of belief hold that, that which actually exists forms the mind/body as a vehicle of perception. This Existence is Consciousness and is not the mind. Therefore, Descartes's declaration becomes, 'I AM, therefore I think.'

That’s all for now, I hope you all now have a better understanding of what Descartes was trying to say.

So, do our old pal Descartes a favor folks and keep thinking, lest you may cease to exist!