"The universe is infinite. For that which is finite has an extreme, and that which has an extreme is looked at in relationship to something else. Consequently, that which has not an extreme, has no boundary; and if it has no boundary, it must be infinite, and not terminated by any limit. The universe then is infinite, both with reference to the quantity of bodies of which it is made up, and to the magnitude of the void; for if the void were infinite, the bodies being finite, then, the bodies would not be able to rest in any place; they would be transported about, scattered across the infinite void for want of any power to steady themselves, or to keep one another in their places by mutual repulsion. If, on the other hand, the void were finite, the bodies being infinite, then the bodies clearly could never be contained in the void."
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"Again: the atoms form the bodies, these full elements from which the combined bodies come, and into which they resolve themselves, assume an incalculable variety of forms, for the numerous differences which the bodies present cannot possibly result from an aggregate of the same forms. Each variety of forms contains an innumerable amount of atoms, but there is not for that reason an infinity of atoms; it is only the number of them which is beyond all calculation."
Epicuro (Tratado sobre a Natureza)
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