In Meditations on First Philosophy by Descartes, the author claims that he doubted on his own identity, and tried to rethink and re-imagine what he really is. According to this book, “I [Descartes] am not that structure of limbs which is called a human body. I am not even some thin vapour which permeates the limbs- a wind, fire, air, breath, or whatever I depict in my imagination; for these things which I have supposed to be nothing.” As he claimed before, “I will suppose therefore that not God, who is supremely good and the source of truth, but rather some malicious demon of the utmost power and cunning has employed all his energies in order to deceive me,” which indicates that all the things that the author can feel and imagine could be all
