nt, Descartes is not prepared to accept that either himself or God exists. He cannot say that God exists, because there remains the possibility that his thoughts are in fact originating from himself (in which case there would be no need for God). Since he has abandoned all notions of existence and certainty, which includes his own body and senses, is it possible that he himself does not exist? To think a thought is bound to existence by definition; one must exist first before having the ability to think. Even if an all-powerful deceiver made it so that I do not exist, it would generate a contradiction since I cannot think that I exists if I don’t. (25) Thinking about existing requires existence as a prerequisite. Descartes has arrived at his first truly tangible and useful element of truth: that it is necessarily true that he exists.The next task that Descartes must consider is to define what he is, and in doing so be careful not to make assumptions. He cannot consider himself to be an animal, since that would require a definition of what an animal is. Such an examination is beyond the discussion. (25) Instead of making random guesses, Descartes begins to think about what came to mind when he considered what he was. (25, 26) The first thought that occurs to him is that he has a body - something that by definition has a determinable shape, defined location and that can occupy space. However, if an all-powerful deceiver is at work, then that which he perceives as being his body might be something else altogether. Without a body, the attributes that would have naturally followed from it’s definition – that he must be nourished, that he changes position and that he engages in sensory perception – must all be discarded. (27) In a flash of inspiration, Descartes realizes that ‘thinking’ is the quantity that is inseparable from existence. He will exist for as long as he is thinking, and for the d...
