““But doubtless I did exist, if I persuaded myself of something. But there is some deceiver or other who is supremely powerful and supremely sly and who is always deliberately deceiving me. Then too there is no doubt that I exist, if he is deceiving me. And let him do his best at deception, he will never bring it about that I am nothing so long as I shall think that I am something. Thus, after everything has been most carefully weighed, it must finally be established that this pronouncement “I am, I exist” is necessarily true every time I utter it or conceive it in my mind.””
![“A doubt that in reality, 'I am not this' has arisen regarding the knowledge of 'Who am I'. From the moment a doubt sets in about the knowledge that one has known up until now, 'we' [the Gnani Purush] Know that the time has come for that knowledge to break! The knowledge over which doubts arise…” quote by Dada Bhagwan](https://sms4smile.com/quotes/img-quotes/932/dada-bhagwan-31_doubt_a-doubt-that-in-reality-i-am-not-this-ha_2717638.jpg)
![“[About Pierre de Fermat] It cannot be denied that he has had many exceptional ideas, and that he is a highly intelligent man. For my part, however, I have always been taught to take a broad overview of things, in order to be able to deduce from them general rules, which might be applicable…” quote by Rene Descartes](https://sms4smile.com/quotes/img-quotes/588/ren-descartes-1376_able_about-pierre-de-fermat-it-cannot-be-deni_89929.jpg)
![“And what more am I? I look for aid to the imagination. [But how mistakenly!] I am not that assemblage of limbs we call the human body; I am not a subtle penetrating air distributed throughout all these members; I am not a wind, a fire, a vapor, a breath or anything at all that I can image. I am…” quote by René Descartes](https://sms4smile.com/quotes/img-quotes/207/ren-descartes-1376_human-body_and-what-more-am-i-i-look-for-aid-to-the_115493.jpg)
