I am not a collection of members which we call the human body: I am not a subtle air distributed through these members, I am not a wind, a fire, a va… - René Descartes

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I am not a collection of members which we call the human body: I am not a subtle air distributed through these members, I am not a wind, a fire, a vapour, a breath, nor anything at all which I can imagine or conceive; because I have assumed that all these were nothing. Without changing that supposition I find that I only leave myself certain of the fact that I am somewhat.