Galilei, Galileo
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The systems of the world
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1661
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[Figure 31]
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mean, that as they move to the centre of the Earth, they move to
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their
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Whole,
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and to their Univerſal Mother: and we are ſtill
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ther ſo free, that we will ſuffer our ſelves to be perſwaded, that
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their natural inſtinct is, not to go towards the centre of the Earth,
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but towards that of the Univerſe; which we know not where to
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find, or whether it be or no; and were it granted to be, it is but
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an imaginary point, and a nothing without any quality. </
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<
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>As to
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what
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Simplicius
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ſaid laſt, that the contending whether the parts
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of the Sun, Moon, or other cœleſtial Body, ſeparated from their
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Whole,
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ſhould naturally return to it, is a vanity, for that the caſe
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is impoſſible; it being clear by the Demonſtrations of
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Ariſtotle,
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that the cœleſtial Bodies are impaſſible, impenetrable,
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ble,
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&c.
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I anſwer, that none of the conditions, whereby
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tle
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diſtinguiſheth the Cœleſtial Bodies from Elementary, hath
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ther foundation than what he deduceth from the diverſity of the
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natural motion of thoſe and theſe; inſomuch that it being
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ed, that the circular motion is peculiar to Cœleſtial Bodies, and
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affirmed, that it is agreeable to all Bodies naturally moveable, it
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is behoofull upon neceſſary conſequence to ſay, either that the
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attributes of generable, or ingenerable, alterable, or unalterable,
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partable, or unpartable,
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&c.
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equally and commonly agree with
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all worldly bodies, namely, as well to the Cœleſtial as to the
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lementary; or that
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Ariſtotle
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hath badly and erroneouſly
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ced thoſe from the circular motion, which he hath aſſigned to
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leſtial Bodies.</
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Grave bodies may
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more rationally be
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affirmed to tend to
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the Centre of the
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Earth, than of the
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Vniverſe.
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The conditions and
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attributes which
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differ the cœleſtial
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bodies from
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mentary, depend on
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the motions
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ed them by
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Ariſt.</
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<
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>SIMPL. </
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>This manner of argumentation tends to the
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on of all Natural Philoſophy, and to the diſorder and ſubverſion
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of Heaven and Earth, and the whole Univerſe; but I believe the
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Fundamentals of the
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Peripateticks
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are ſuch, that we need not
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fear that new Sciences can be erected upon their ruines.</
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<
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<
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>Take no thought in this place for Heaven or the Earth,
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neither fear their ſubverſion, or the ruine of Philoſophy. </
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>As to
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Heaven, your fears are vain for that which you your ſelf hold
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unalterable and impaſſible; as for the Earth, we ſtrive to enoble
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and perfect it, whilſt we make it like to the Cœleſtial Bodies,
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and as it were place it in Heaven, whence your Philoſophers have
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exiled it. </
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Diſputes, for if our conceptions prove true, new Diſcoveries will
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be made; if falſe, the firſt Doctrine will be more confirmed.
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<
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>Rather beſtow your care upon ſome Philoſophers, and help and
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defend them; for as to the Science it ſelf, it cannot but improve.
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<
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>And that we may return to our purpoſe, be pleaſed freely to
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duce what preſents it ſelf to you in confirmation of that great
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ference which
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Ariſtotle
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puts between the Cœleſtial Bodies, and
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the Elementary parts of the World, in making thoſe ingenerable, </
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