Descartes, René
,
Renati Des-Cartes principia philosophiae
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illos ex naturâ ſuà ceſſare, ſive tendere ad quietem. </
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Quod profecto legibus naturae quàm-maxim adverſa
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tur: quies enim motui eſt contraria, nihilque ad ſuum
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contrarium, ſive ad deſtructionem ſui ipſius, ex pro</
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XXXVII.
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Prima les naturae:
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quòd unaquaeque res,
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quantum in ſe eſt,
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ſemper in eodem statu
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perſeveret; ſicque
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quòd ſemel movetur,
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ſemper moveri per
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gat. </
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priâ naturà ferri poteſt. </
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Et verò quotidiana experientia, in iis quae projiciun
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tur regulam noſtram omnino confirmat. </
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>Neque enim
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alia ratio eſt, cur projecta perſeverent aliquandiu in
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motu, poſtquam à manu jaciente ſeparata ſunt, quàm
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quia ſemel mota pergunt moveri donec ab obviis cor
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poribus retardentur. </
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>Et manifeſtum eſt ipſa ſolere ab
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ae
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re, aliiſve quibuſlibet fluidis corporibus in quibus
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moventur, paulatim retardari, atque ideb motum ipſo
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rum diu durare non poſſe. </
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rem enim motibus alio
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rum corporum reſiſtere, ipſo ſenſu tadús poſſumus ex
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periri, ſi flabello ipſum percutiamus; idemque volatus
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avium confirmat. </
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>Et nullus alius eſt liquor, qui non
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manifeſtiús adhuc, quàm ae
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r, motibus projectorum
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reſiſtat. </
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XXXVIII.
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De motu projectorum. </
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Altera lex naturae eſt: unamquamque partem mate
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riae, ſeorſim ſpectatam, non tendere unquam ut ſecun
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dúm ullas lineas obliquas pergat moveri, ſed tantum
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modo ſecundúm rectas; etſi multae ſaepe cogantur
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deflectere propter occurſum aliarum, atque, ut paulò
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antè dictum eſt a, in quolibet motu fiat quodammodo
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circulus, ex omni materiâ ſimul motâ. </
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>Cauſa hujus
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regulae eadem eſt quae praecedentis, nempe immutabi
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litas & ſimplicitas operationis, per quam Deus motum
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in materiâ conſervat. </
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niſi praeciſè qualis eſt eo ipſo temporis momento quo </
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