descartes¡¯ reason discourse(µÑ¿¨¶ûµÄÍÆÀí)-µÚ10²¿·Ö
°´¼üÅÌÉÏ·½Ïò¼ü ¡û »ò ¡ú ¿É¿ìËÙÉÏÏ·ҳ£¬°´¼üÅÌÉ쵀 Enter ¼ü¿É»Øµ½±¾ÊéĿ¼ҳ£¬°´¼üÅÌÉÏ·½Ïò¼ü ¡ü ¿É»Øµ½±¾Ò³¶¥²¿£¡
¡ª¡ª¡ª¡ªÎ´ÔĶÁÍꣿ¼ÓÈëÊéÇ©ÒѱãÏ´μÌÐøÔĶÁ£¡
might¡¡be¡¡generated¡¡and£»¡¡among¡¡other¡¡things¡¡in¡¡the¡¡discoveries¡¡alluded¡¡to¡¡
inasmuch¡¡as¡¡besides¡¡the¡¡stars£»¡¡I¡¡knew¡¡nothing¡¡except¡¡fire¡¡which¡¡produces¡¡
light£»¡¡¡¡¡¡I¡¡¡¡¡¡spared¡¡¡¡¡¡no¡¡¡¡¡¡pains¡¡¡¡¡¡to¡¡¡¡¡¡set¡¡¡¡¡¡forth¡¡¡¡¡¡all¡¡¡¡¡¡that¡¡¡¡¡¡pertains¡¡¡¡¡¡to¡¡¡¡¡¡its¡¡¡¡¡¡nature£»¡¡¡¡¡¡¡¡¡¡¡¡the¡¡
manner¡¡¡¡¡¡¡¡¡¡¡¡¡¡of¡¡¡¡¡¡its¡¡¡¡production¡¡¡¡¡¡¡¡¡¡¡¡and¡¡¡¡¡¡¡¡support£»¡¡¡¡¡¡¡¡and¡¡¡¡¡¡¡¡to¡¡¡¡¡¡explain¡¡¡¡¡¡¡¡how¡¡¡¡¡¡¡¡¡¡heat¡¡¡¡¡¡¡¡is¡¡
sometimes¡¡found¡¡without¡¡light£»¡¡and¡¡light¡¡without¡¡heat£»¡¡to¡¡show¡¡how¡¡it¡¡can¡¡
induce¡¡¡¡¡¡various¡¡¡¡¡¡colors¡¡¡¡¡¡upon¡¡¡¡¡¡different¡¡¡¡¡¡bodies¡¡¡¡¡¡and¡¡¡¡¡¡other¡¡¡¡¡¡diverse¡¡¡¡¡¡qualities£»¡¡
how¡¡¡¡¡¡it¡¡¡¡¡¡reduces¡¡¡¡¡¡some¡¡¡¡¡¡to¡¡¡¡¡¡a¡¡¡¡¡¡liquid¡¡¡¡¡¡state¡¡¡¡¡¡and¡¡¡¡¡¡hardens¡¡¡¡¡¡others£»¡¡¡¡¡¡how¡¡¡¡¡¡it¡¡¡¡¡¡can¡¡
consume¡¡¡¡¡¡almost¡¡¡¡¡¡all¡¡¡¡¡¡bodies£»¡¡¡¡¡¡or¡¡¡¡¡¡convert¡¡¡¡¡¡them¡¡¡¡¡¡into¡¡¡¡¡¡ashes¡¡¡¡¡¡and¡¡¡¡¡¡smoke£»¡¡¡¡¡¡and¡¡
finally£»¡¡how¡¡from¡¡these¡¡ashes£»¡¡by¡¡the¡¡mere¡¡intensity¡¡of¡¡its¡¡action£»¡¡it¡¡forms¡¡
glass£º¡¡¡¡¡¡¡¡¡¡for¡¡¡¡¡¡as¡¡¡¡¡¡this¡¡¡¡¡¡transmutation¡¡¡¡¡¡of¡¡¡¡¡¡ashes¡¡¡¡¡¡into¡¡¡¡¡¡glass¡¡¡¡¡¡appeared¡¡¡¡¡¡to¡¡¡¡¡¡me¡¡¡¡¡¡as¡¡
wonderful¡¡as¡¡any¡¡other¡¡in¡¡nature£»¡¡I¡¡took¡¡a¡¡special¡¡pleasure¡¡in¡¡describing¡¡it¡£¡¡
I¡¡was¡¡not£»¡¡however£»¡¡disposed£»¡¡from¡¡these¡¡circumstances£»¡¡to¡¡conclude¡¡that¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡34¡¡
¡¡¡Page¡¡35¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡DISCOURSE¡¡ON¡¡THE¡¡METHOD¡¡OF¡¡RIGHTLY¡¡CONDUCTING¡¡THE¡¡REASON£»¡¡AND¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡SEEKING¡¡TRUTH¡¡IN¡¡THE¡¡SCIENCES¡¡
this¡¡world¡¡had¡¡been¡¡created¡¡in¡¡the¡¡manner¡¡I¡¡described£»¡¡for¡¡it¡¡is¡¡much¡¡more¡¡
likely¡¡that¡¡God¡¡made¡¡it¡¡at¡¡the¡¡first¡¡such¡¡as¡¡it¡¡was¡¡to¡¡be¡£¡¡But¡¡this¡¡is¡¡certain£»¡¡
and¡¡an¡¡opinion¡¡monly¡¡received¡¡among¡¡theologians£»¡¡that¡¡the¡¡action¡¡by¡¡
which¡¡¡¡¡¡he¡¡¡¡¡¡now¡¡¡¡¡¡sustains¡¡¡¡¡¡it¡¡¡¡¡¡is¡¡¡¡¡¡the¡¡¡¡¡¡same¡¡¡¡¡¡with¡¡¡¡¡¡that¡¡¡¡¡¡by¡¡¡¡¡¡which¡¡¡¡¡¡he¡¡¡¡¡¡originally¡¡
created¡¡¡¡¡¡it£»¡¡¡¡¡¡so¡¡¡¡¡¡that¡¡¡¡¡¡even¡¡¡¡¡¡although¡¡¡¡¡¡he¡¡¡¡¡¡had¡¡¡¡¡¡from¡¡¡¡¡¡the¡¡¡¡¡¡beginning¡¡¡¡¡¡given¡¡¡¡¡¡it¡¡¡¡¡¡no¡¡
other¡¡¡¡¡¡form¡¡¡¡¡¡than¡¡¡¡¡¡that¡¡¡¡¡¡of¡¡¡¡¡¡chaos£»¡¡¡¡¡¡provided¡¡¡¡¡¡only¡¡¡¡¡¡he¡¡¡¡¡¡had¡¡¡¡¡¡established¡¡¡¡¡¡certain¡¡
laws¡¡of¡¡nature£»¡¡and¡¡had¡¡lent¡¡it¡¡his¡¡concurrence¡¡to¡¡enable¡¡it¡¡to¡¡act¡¡as¡¡it¡¡is¡¡
wont¡¡to¡¡do£»¡¡it¡¡may¡¡be¡¡believed£»¡¡without¡¡discredit¡¡to¡¡the¡¡miracle¡¡of¡¡creation£»¡¡
that£»¡¡¡¡¡¡in¡¡¡¡¡¡this¡¡¡¡¡¡way¡¡¡¡¡¡alone£»¡¡¡¡¡¡things¡¡¡¡¡¡purely¡¡¡¡¡¡material¡¡¡¡¡¡might£»¡¡¡¡¡¡in¡¡¡¡¡¡course¡¡¡¡¡¡of¡¡¡¡¡¡time£»¡¡
have¡¡bee¡¡such¡¡as¡¡we¡¡observe¡¡them¡¡at¡¡present£»¡¡and¡¡their¡¡nature¡¡is¡¡much¡¡
more¡¡¡¡¡¡¡¡¡¡easily¡¡¡¡¡¡¡¡conceived¡¡¡¡¡¡¡¡¡¡when¡¡¡¡¡¡¡¡¡¡they¡¡¡¡¡¡are¡¡¡¡¡¡beheld¡¡¡¡¡¡¡¡ing¡¡¡¡¡¡¡¡¡¡¡¡in¡¡¡¡this¡¡¡¡manner¡¡
gradually¡¡into¡¡existence£»¡¡than¡¡when¡¡they¡¡are¡¡only¡¡considered¡¡as¡¡produced¡¡
at¡¡once¡¡in¡¡a¡¡finished¡¡and¡¡perfect¡¡state¡£¡¡
¡¡¡¡¡¡¡¡¡¡From¡¡¡¡¡¡¡¡¡¡¡¡the¡¡¡¡description¡¡¡¡¡¡¡¡¡¡of¡¡¡¡inanimate¡¡¡¡¡¡¡¡¡¡¡¡bodies¡¡¡¡¡¡¡¡and¡¡¡¡¡¡plants£»¡¡¡¡¡¡I¡¡¡¡passed¡¡¡¡¡¡¡¡to¡¡
animals£»¡¡¡¡¡¡and¡¡¡¡¡¡particularly¡¡¡¡¡¡to¡¡¡¡¡¡man¡£¡¡¡¡¡¡¡¡¡¡¡¡But¡¡¡¡¡¡since¡¡¡¡¡¡I¡¡¡¡¡¡had¡¡¡¡¡¡not¡¡¡¡¡¡as¡¡¡¡¡¡yet¡¡¡¡¡¡sufficient¡¡
knowledge¡¡to¡¡enable¡¡me¡¡to¡¡treat¡¡of¡¡these¡¡in¡¡the¡¡same¡¡manner¡¡as¡¡of¡¡the¡¡rest£»¡¡
that¡¡is¡¡to¡¡say£»¡¡by¡¡deducing¡¡effects¡¡from¡¡their¡¡causes£»¡¡and¡¡by¡¡showing¡¡from¡¡
what¡¡elements¡¡and¡¡in¡¡what¡¡manner¡¡nature¡¡must¡¡produce¡¡them£»¡¡I¡¡remained¡¡
satisfied¡¡¡¡¡¡with¡¡¡¡¡¡the¡¡¡¡¡¡supposition¡¡¡¡¡¡that¡¡¡¡¡¡God¡¡¡¡¡¡formed¡¡¡¡¡¡the¡¡¡¡¡¡body¡¡¡¡¡¡of¡¡¡¡¡¡man¡¡¡¡¡¡wholly¡¡
like¡¡to¡¡one¡¡of¡¡ours£»¡¡as¡¡well¡¡in¡¡the¡¡external¡¡shape¡¡of¡¡the¡¡members¡¡as¡¡in¡¡the¡¡
internal¡¡¡¡¡¡conformation¡¡¡¡¡¡of¡¡¡¡¡¡the¡¡¡¡¡¡organs£»¡¡¡¡¡¡of¡¡¡¡¡¡the¡¡¡¡¡¡same¡¡¡¡¡¡matter¡¡¡¡¡¡with¡¡¡¡¡¡that¡¡¡¡¡¡I¡¡¡¡¡¡had¡¡
described£»¡¡and¡¡at¡¡first¡¡placed¡¡in¡¡it¡¡no¡¡rational¡¡soul£»¡¡nor¡¡any¡¡other¡¡principle£»¡¡
in¡¡room¡¡of¡¡the¡¡vegetative¡¡or¡¡sensitive¡¡soul£»¡¡beyond¡¡kindling¡¡in¡¡the¡¡heart¡¡
one¡¡of¡¡those¡¡fires¡¡without¡¡light£»¡¡such¡¡as¡¡I¡¡had¡¡already¡¡described£»¡¡and¡¡which¡¡
I¡¡¡¡¡¡thought¡¡¡¡¡¡was¡¡¡¡¡¡not¡¡¡¡¡¡different¡¡¡¡¡¡from¡¡¡¡¡¡the¡¡¡¡¡¡heat¡¡¡¡¡¡in¡¡¡¡¡¡hay¡¡¡¡¡¡that¡¡¡¡¡¡has¡¡¡¡¡¡been¡¡¡¡¡¡heaped¡¡
together¡¡before¡¡it¡¡is¡¡dry£»¡¡or¡¡that¡¡which¡¡causes¡¡fermentation¡¡in¡¡new¡¡wines¡¡
before¡¡they¡¡are¡¡run¡¡clear¡¡of¡¡the¡¡fruit¡£¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡For£»¡¡when¡¡I¡¡examined¡¡the¡¡kind¡¡of¡¡
functions¡¡which¡¡might£»¡¡as¡¡consequences¡¡of¡¡this¡¡supposition£»¡¡exist¡¡in¡¡this¡¡
body£»¡¡I¡¡found¡¡precisely¡¡all¡¡those¡¡which¡¡may¡¡exist¡¡in¡¡us¡¡independently¡¡of¡¡
all¡¡¡¡¡¡power¡¡¡¡¡¡of¡¡¡¡¡¡thinking£»¡¡¡¡¡¡and¡¡¡¡¡¡consequently¡¡¡¡¡¡without¡¡¡¡¡¡being¡¡¡¡¡¡in¡¡¡¡¡¡any¡¡¡¡¡¡measure¡¡
owing¡¡to¡¡the¡¡soul£»¡¡in¡¡other¡¡words£»¡¡to¡¡that¡¡part¡¡of¡¡us¡¡which¡¡is¡¡distinct¡¡from¡¡
the¡¡body£»¡¡and¡¡of¡¡which¡¡it¡¡has¡¡been¡¡said¡¡above¡¡that¡¡the¡¡nature¡¡distinctively¡¡
consists¡¡in¡¡thinking£»¡¡functions¡¡in¡¡which¡¡the¡¡animals¡¡void¡¡of¡¡reason¡¡may¡¡be¡¡
said¡¡wholly¡¡to¡¡resemble¡¡us£»¡¡but¡¡among¡¡which¡¡I¡¡could¡¡not¡¡discover¡¡any¡¡of¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡35¡¡
¡¡¡Page¡¡36¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡DISCOURSE¡¡ON¡¡THE¡¡METHOD¡¡OF¡¡RIGHTLY¡¡CONDUCTING¡¡THE¡¡REASON£»¡¡AND¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡SEEKING¡¡TRUTH¡¡IN¡¡THE¡¡SCIENCES¡¡
those¡¡that£»¡¡as¡¡dependent¡¡on¡¡thought¡¡alone£»¡¡belong¡¡to¡¡us¡¡as¡¡men£»¡¡while£»¡¡on¡¡
the¡¡other¡¡hand£»¡¡I¡¡did¡¡afterwards¡¡discover¡¡these¡¡as¡¡soon¡¡as¡¡I¡¡supposed¡¡God¡¡
to¡¡have¡¡created¡¡a¡¡rational¡¡soul£»¡¡and¡¡to¡¡have¡¡annexed¡¡it¡¡to¡¡this¡¡body¡¡in¡¡¡¡¡¡a¡¡
particular¡¡manner¡¡which¡¡I¡¡described¡£¡¡
¡¡¡¡¡¡¡¡¡¡But£»¡¡in¡¡order¡¡to¡¡show¡¡how¡¡I¡¡there¡¡handled¡¡this¡¡matter£»¡¡I¡¡mean¡¡here¡¡to¡¡
give¡¡the¡¡explication¡¡of¡¡the¡¡motion¡¡of¡¡the¡¡heart¡¡and¡¡arteries£»¡¡which£»¡¡as¡¡the¡¡
first¡¡and¡¡most¡¡general¡¡motion¡¡observed¡¡in¡¡animals£»¡¡will¡¡afford¡¡the¡¡means¡¡
of¡¡readily¡¡determining¡¡what¡¡should¡¡be¡¡thought¡¡of¡¡all¡¡the¡¡rest¡£¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡And¡¡that¡¡
there¡¡may¡¡be¡¡less¡¡difficulty¡¡in¡¡understanding¡¡¡¡what¡¡I¡¡am¡¡¡¡about¡¡to¡¡say¡¡¡¡on¡¡
this¡¡¡¡¡¡subject£»¡¡¡¡¡¡I¡¡¡¡¡¡advise¡¡¡¡¡¡those¡¡¡¡¡¡who¡¡¡¡¡¡are¡¡¡¡¡¡not¡¡¡¡¡¡versed¡¡¡¡¡¡in¡¡¡¡¡¡anatomy£»¡¡¡¡¡¡before¡¡¡¡¡¡they¡¡
mence¡¡the¡¡perusal¡¡of¡¡these¡¡observations£»¡¡to¡¡take¡¡the¡¡trouble¡¡of¡¡getting¡¡
dissected¡¡¡¡¡¡in¡¡¡¡¡¡their¡¡¡¡¡¡presence¡¡¡¡¡¡the¡¡¡¡¡¡heart¡¡¡¡¡¡of¡¡¡¡¡¡some¡¡¡¡¡¡large¡¡¡¡¡¡animal¡¡¡¡¡¡possessed¡¡¡¡¡¡of¡¡
lungs¡¡¡¡¡¡£¨for¡¡¡¡¡¡this¡¡¡¡¡¡is¡¡¡¡¡¡throughout¡¡¡¡¡¡sufficiently¡¡¡¡¡¡like¡¡¡¡¡¡the¡¡¡¡¡¡human£©£»¡¡¡¡¡¡and¡¡¡¡¡¡to¡¡¡¡¡¡have¡¡
shown¡¡to¡¡them¡¡its¡¡two¡¡ventricles¡¡or¡¡cavities£º¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡in¡¡the¡¡first¡¡place£»¡¡that¡¡in¡¡the¡¡
right¡¡side£»¡¡with¡¡which¡¡correspond¡¡two¡¡very¡¡ample¡¡tubes£»¡¡viz¡££»¡¡the¡¡hollow¡¡
vein¡¡£¨vena¡¡cava£©£»¡¡which¡¡is¡¡the¡¡principal¡¡receptacle¡¡of¡¡the¡¡blood£»¡¡and¡¡the¡¡
trunk¡¡of¡¡the¡¡tree£»¡¡as¡¡it¡¡were£»¡¡of¡¡which¡¡all¡¡the¡¡other¡¡veins¡¡in¡¡the¡¡body¡¡are¡¡
branches£»¡¡¡¡¡¡¡¡¡¡¡¡and¡¡¡¡¡¡¡¡the¡¡¡¡¡¡arterial¡¡¡¡¡¡vein¡¡¡¡¡¡¡¡£¨vena¡¡¡¡¡¡¡¡arteriosa£©£»¡¡¡¡¡¡¡¡inappropriately¡¡¡¡¡¡¡¡¡¡¡¡so¡¡
denominated£»¡¡since¡¡it¡¡is¡¡in¡¡truth¡¡only¡¡an¡¡artery£»¡¡which£»¡¡taking¡¡its¡¡rise¡¡in¡¡the¡¡
heart£»¡¡¡¡¡¡is¡¡¡¡¡¡divided£»¡¡¡¡¡¡after¡¡¡¡¡¡passing¡¡¡¡¡¡out¡¡¡¡¡¡from¡¡¡¡¡¡it£»¡¡¡¡¡¡into¡¡¡¡¡¡many¡¡¡¡¡¡branches¡¡¡¡¡¡which¡¡
presently¡¡disperse¡¡themselves¡¡all¡¡over¡¡the¡¡lungs£»¡¡in¡¡the¡¡second¡¡place£»¡¡the¡¡
cavity¡¡¡¡¡¡in¡¡¡¡¡¡the¡¡¡¡¡¡left¡¡¡¡¡¡side£»¡¡¡¡¡¡with¡¡¡¡¡¡which¡¡¡¡¡¡correspond¡¡¡¡¡¡in¡¡¡¡¡¡the¡¡¡¡¡¡same¡¡¡¡¡¡manner¡¡¡¡¡¡two¡¡
canals¡¡in¡¡size¡¡equal¡¡to¡¡or¡¡larger¡¡than¡¡the¡¡preceding£»¡¡viz¡££»¡¡the¡¡venous¡¡artery¡¡
£¨arteria¡¡¡¡¡¡venosa£©£»¡¡¡¡¡¡likewise¡¡¡¡¡¡inappropriately¡¡¡¡¡¡thus¡¡¡¡¡¡designated£»¡¡¡¡¡¡because¡¡¡¡¡¡it¡¡¡¡¡¡is¡¡
simply¡¡a¡¡vein¡¡which¡¡es¡¡from¡¡the¡¡lungs£»¡¡where¡¡it¡¡is¡¡divided¡¡into¡¡many¡¡
branches£»¡¡interlaced¡¡with¡¡those¡¡of¡¡the¡¡arterial¡¡vein£»¡¡and¡¡those¡¡of¡¡the¡¡tube¡¡
called¡¡the¡¡windpipe£»¡¡through¡¡which¡¡the¡¡air¡¡we¡¡breathe¡¡enters£»¡¡and¡¡the¡¡great¡¡
artery¡¡which£»¡¡issuing¡¡from¡¡the¡¡heart£»¡¡sends¡¡its¡¡branches¡¡all¡¡over¡¡the¡¡body¡£¡¡
I¡¡¡¡¡¡should¡¡¡¡¡¡wish¡¡¡¡¡¡also¡¡¡¡¡¡that¡¡¡¡¡¡such¡¡¡¡¡¡persons¡¡¡¡¡¡were¡¡¡¡¡¡carefully¡¡¡¡¡¡shown¡¡¡¡¡¡the¡¡¡¡¡¡eleven¡¡
pellicles¡¡which£»¡¡like¡¡so¡¡many¡¡small¡¡valves£»¡¡open¡¡and¡¡shut¡¡the¡¡four¡¡orifices¡¡
that¡¡are¡¡in¡¡these¡¡two¡¡cavities£»¡¡viz¡££»¡¡three¡¡at¡¡the¡¡entrance¡¡of¡¡the¡¡hollow¡¡veins¡¡
where¡¡they¡¡are¡¡disposed¡¡in¡¡such¡¡a¡¡manner¡¡as¡¡by¡¡no¡¡means¡¡to¡¡prevent¡¡the¡¡
blood¡¡which¡¡it¡¡contains¡¡from¡¡flowing¡¡into¡¡the¡¡right¡¡ventricle¡¡of¡¡the¡¡heart£»¡¡
and¡¡¡¡¡¡yet¡¡¡¡¡¡exactly¡¡¡¡¡¡to¡¡¡¡¡¡prevent¡¡¡¡¡¡its¡¡¡¡¡¡flowing¡¡¡¡¡¡out£»¡¡¡¡¡¡three¡¡¡¡¡¡at¡¡¡¡¡¡the¡¡¡¡¡¡entrance¡¡¡¡¡¡to¡¡¡¡¡¡the¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡36¡¡
¡¡¡Page¡¡37¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡DISCOURSE¡¡ON¡¡THE¡¡METHOD¡¡OF¡¡RIGHTLY¡¡CONDUCTING¡¡THE¡¡REASON£»¡¡AND¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡SEEKING¡¡TRUTH¡¡IN¡¡THE¡¡SCIENCES¡¡
arterial¡¡¡¡¡¡vein£»¡¡¡¡¡¡which£»¡¡¡¡¡¡arranged¡¡¡¡¡¡in¡¡¡¡¡¡a¡¡¡¡¡¡manner¡¡¡¡¡¡exactly¡¡¡¡¡¡the¡¡¡¡¡¡opposite¡¡¡¡¡¡of¡¡¡¡¡¡the¡¡
former£»¡¡readily¡¡permit¡¡the¡¡blood¡¡contained¡¡in¡¡this¡¡cavity¡¡to¡¡pass¡¡into¡¡the¡¡
lungs£»¡¡but¡¡hinder¡¡that¡¡contained¡¡in¡¡the¡¡lungs¡¡from¡¡returning¡¡to¡¡this¡¡cavity£»¡¡
and£»¡¡in¡¡like¡¡manner£»¡¡two¡¡others¡¡at¡¡the¡¡mouth¡¡of¡¡the¡¡venous¡¡artery£»¡¡which¡¡
allow¡¡the¡¡blood¡¡from¡¡the¡¡lungs¡¡to¡¡flow¡¡into¡¡the¡¡left¡¡cavity¡¡of¡¡the¡¡heart£»¡¡but¡¡
preclude¡¡its¡¡return£»¡¡and¡¡three¡¡at¡¡the¡¡mouth¡¡of¡¡the¡¡great¡¡artery£»¡¡which¡¡suffer¡¡
the¡¡blood¡¡to¡¡flow¡¡from¡¡the¡¡heart£»¡¡but¡¡prevent¡¡its¡¡reflux¡£¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡Nor¡¡do¡¡we¡¡need¡¡
to¡¡seek¡¡any¡¡other¡¡reason¡¡for¡¡the¡¡number¡¡of¡¡these¡¡pellicles¡¡beyond¡¡this¡¡that¡¡
the¡¡orifice¡¡of¡¡the¡¡venous¡¡artery¡¡being¡¡of¡¡an¡¡oval¡¡shape¡¡from¡¡the¡¡nature¡¡of¡¡
its¡¡situation£»¡¡can¡¡be¡¡adequately¡¡closed¡¡with¡¡two£»¡¡whereas¡¡the¡¡others¡¡being¡¡
round¡¡¡¡¡¡are¡¡¡¡¡¡more¡¡¡¡¡¡conveniently¡¡¡¡¡¡closed¡¡¡¡¡¡with¡¡¡¡¡¡three¡£¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡Besides£»¡¡¡¡¡¡I¡¡¡¡¡¡wish¡¡¡¡¡¡such¡¡
persons¡¡to¡¡observe¡¡that¡¡the¡¡grand¡¡artery¡¡and¡¡the¡¡arterial¡¡vein¡¡are¡¡of¡¡much¡¡
harder¡¡and¡¡firmer¡¡texture¡¡than¡¡the¡¡venous¡¡artery¡¡and¡¡the¡¡hollow¡¡vein£»¡¡and¡¡
that¡¡¡¡¡¡the¡¡¡¡¡¡two¡¡¡¡¡¡last¡¡¡¡¡¡expand¡¡¡¡¡¡before¡¡¡¡¡¡entering¡¡¡¡¡¡the¡¡¡¡¡¡heart£»¡¡¡¡¡¡and¡¡¡¡¡¡there¡¡¡¡¡¡form£»¡¡¡¡¡¡as¡¡¡¡¡¡it¡¡
were£»¡¡¡¡¡¡¡¡¡¡two¡¡¡¡¡¡pouches¡¡¡¡¡¡¡¡¡¡denominated¡¡¡¡¡¡¡¡¡¡¡¡¡¡the¡¡¡¡auricles¡¡¡¡¡¡of¡¡¡¡¡¡the¡¡¡¡heart£»¡¡¡¡¡¡which¡¡¡¡¡¡¡¡are¡¡
posed¡¡of¡¡a¡¡substance¡¡similar¡¡to¡¡that¡¡of¡¡the¡¡heart¡¡itself£»¡¡and¡¡that¡¡there¡¡is¡¡
always¡¡more¡¡warmth¡¡in¡¡the¡¡heart¡¡than¡¡in¡¡any¡¡other¡¡part¡¡of¡¡the¡¡body¡¡¡and¡¡
finally£»¡¡that¡¡this¡¡heat¡¡is¡¡capable¡¡of¡¡causing¡¡any¡¡drop¡¡of¡¡blood¡¡that¡¡passes¡¡
into¡¡the¡¡cavities¡¡rapidly¡¡to¡¡expand¡¡and¡¡dilate£»¡¡just¡¡as¡¡all¡¡liquors¡¡do¡¡when¡¡
allowed¡¡to¡¡fall¡¡drop¡¡by¡¡drop¡¡into¡¡a¡¡highly¡¡heated¡¡vessel¡£¡¡
¡¡¡¡¡¡¡¡¡¡For£»¡¡after¡¡these¡¡things£»¡¡it¡¡is¡¡not¡¡necessary¡¡for¡¡me¡¡to¡¡say¡¡anything¡¡more¡¡
with¡¡¡¡¡¡a¡¡¡¡¡¡view¡¡¡¡¡¡to¡¡¡¡¡¡explain¡¡¡¡¡¡the¡¡¡¡¡¡motion¡¡¡¡¡¡¡¡of¡¡¡¡¡¡the¡¡¡¡¡¡heart£»¡¡¡¡¡¡except¡¡¡¡¡¡that¡¡¡¡¡¡when¡¡¡¡its¡¡
cavities¡¡are¡¡not¡¡full¡¡of¡¡blood£»¡¡into¡¡these¡¡the¡¡blood¡¡of¡¡necessity¡¡flows£»¡¡¡¡¡¡¡¡
from¡¡the¡¡hollow¡¡vein¡¡into¡¡the¡¡right£»¡¡and¡¡from¡¡the¡¡venous¡¡artery¡¡into¡¡the¡¡left£»¡¡
because¡¡¡¡¡¡these¡¡¡¡¡¡two¡¡¡¡¡¡vessels¡¡¡¡¡¡are¡¡¡¡¡¡always¡¡¡¡¡¡full¡¡¡¡¡¡of¡¡¡¡¡¡blood£»¡¡¡¡¡¡and¡¡¡¡¡¡their¡¡¡¡¡¡orifices£»¡¡
which¡¡are¡¡turned¡¡towards¡¡the¡¡heart£»¡¡cannot¡¡then¡¡be¡¡closed¡£¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡But¡¡as¡¡soon¡¡as¡¡
two¡¡drops¡¡of¡¡blood¡¡have¡¡thus¡¡passed£»¡¡one¡¡into¡¡each¡¡of¡¡the¡¡cavities£»¡¡these¡¡
drops¡¡which¡¡cannot¡¡but¡¡be¡¡very¡¡large£»¡¡because¡¡the¡¡orifices¡¡through¡¡which¡¡
they¡¡pass¡¡are¡¡wide£»¡¡and¡¡the¡¡vessels¡¡from¡¡which¡¡they¡¡e¡¡full¡¡of¡¡blood£»¡¡
are¡¡immediately¡¡rarefied£»¡¡and¡¡dilated¡¡by¡¡the¡¡heat¡¡they¡¡meet¡¡with¡£¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡In¡¡this¡¡
way¡¡¡¡¡¡they¡¡¡¡¡¡cause¡¡¡¡¡¡the¡¡¡¡¡¡whole¡¡¡¡¡¡heart¡¡¡¡¡¡to¡¡¡¡¡¡expand£»¡¡¡¡¡¡and¡¡¡¡¡¡at¡¡¡¡¡¡the¡¡¡¡¡¡same¡¡¡¡¡¡time¡¡¡¡¡¡press¡¡
home¡¡and¡¡shut¡¡the¡¡five¡¡small¡¡valves¡¡that¡¡are¡¡at¡¡the¡¡entrances¡¡of¡¡the¡¡two¡¡
vessels¡¡¡¡¡¡from¡¡¡¡¡¡which¡¡¡¡¡¡they¡¡¡¡¡¡flow£»¡¡¡¡¡¡and¡¡¡¡¡¡thus¡¡¡¡¡¡prevent¡¡¡¡¡¡any¡¡¡¡¡¡more¡¡¡¡¡¡blood¡¡¡¡¡¡from¡¡
ing¡¡down¡¡into¡¡the¡¡heart£»¡¡and¡¡being¡¡more¡¡and¡¡more¡¡rarefied£»¡¡they¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡