Since Aristotle, in distinguishing his philosophy from the philosophy of Parmenides, maintains that in the first place Parmenides seems to understand the One as the principle of thought, and Melissus as matter, we must remark that this distinction falls away in pure existence, Being, or the One. Pure matter, as also pure thought (if I am to speak of such a distinction), are not present to Parmenides and Melissus, since they are abrogated; and it must only be in the manner of his expression that one of them—according to Aristotle (Phys. I. 2), on account of his clumsier mode of treatment (_μᾶλλον φορτικός_)—could seem to have conceived of the other sense. If the difference consisted secondly in the fact that Parmenides regarded the one as limited and Melissus as unlimited, this limitation of the one would, in effect, immediately contradict the philosophy of Parmenides; for since limit is the non-being of Being, non-being would thus be posited. But when Parmenides speaks of limit, we see that his poetic language is not altogether exact; limit, however, as pure limit, is just simple Being and absolute negativity, in which all else said and set forth is sublated. Necessity, as this pure negativity and movement within itself, although impassive thought, is absolutely bound to its opposite. In the third place it may be said that Parmenides set forth a concomitant philosophy of opinion or reality, to which Being as existence for thought was thus more opposed than was the case with Melissus. 4. ZENO.