And what more am i? i look for aid to the imagination. [but how mistakenly!] i am not the assemblage of limbs we call the human body; i am not 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 imagine. i am supposing all these things to be nothing. yet i find, while so doing, that i am still assured that i am still something."rene descartes, mediations on first philosophy