I think then I exist

The title refers to a philosophical approach of Rene Descartes, for those who do not know, Descartes is a French philosopher and mathematician, who lived between 1596-1650. Its Latin phrase "cogito ergo sum" became the main element of western reasoning.

With this thought Descartes seek to establish an absolute truth, in a deductive system in which thought is the main protagonist, which, with all the conscious acts of the spirit, always or almost always will generate doubts, between what we think and feel, like Was spoken in the previous blog.
To doubt everything, as you discard, will be only a methodological procedure to find an undoubted truth before an abstract situation or thought. In this case, eliminating it was not a very feasible way out, so discard it, assimilate it in such a way that, if a person is doubting he should not think that he is not doing it and be sure of that doubt, since this will lead him to reason And reach the production of knowledge.

This approach would go even further, when discarding poses that although we all have a mind and a body, the only certainty is the existence is the mind, because we can not be sure that this body exists.

Here is the sentence in its original context:

"But I immediately noticed that while I wanted to think that everything was false, it was necessary that I, who thought it, should be something. And noting that this truth: I think, therefore, I am was so firm and certain, that I could not break it nor the most extravagant assumptions of the skeptics, I judged that I could admit, without scruple, as the first principle of philosophy that was searching."

Bibliography:
https://www.significados.com/pienso-luego-existo/
Personally I do not like wikipedia but that's where I extracted the complete sentence
https://es.wikipedia.org/wiki/Cogito_ergo_sum
Images taken from:
https://pixabay.com
https://www.google.co.ve/search?q=rene+descartes&espv=2&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjK6Myq9orRAhVCSiYKHXDlCuIQ_AUICCgB#imgrc=_