Galilei, Galileo, The systems of the world, 1661

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1nor eſſaies to move whither it is impoſſible to arrive. And if any
one
ſhould yet object, that albeit the right line, and
ly
the motion by it is producible in infinitum, that is to ſay, is
terminate
; yet nevertheleſs Nature, as one may ſay, arbitrarily
hath
aſſigned them ſome terms, and given natural inſtincts to
its
natural bodies to move unto the ſame; I will reply, that this

might
perhaps be fabled to have come to paſs in the firſt Chaos,
where
indiſtinct matters confuſedly and inordinately wandered;
to
regulate which, Nature very appoſitely made uſe of right

tions
, by which, like as the well-conſtituted, moving, diſdorder
themſelves
, ſo were they which were before depravedly diſpoſed
by
this motion ranged in order: but after their exquiſite
tion
and collocation, it is impoſſible that there ſhould remain
tural
inclinations in them of longer moving in a right motion,
from
which now would enſue their removal from their proper and
natural
place, that is to ſay, their diſordination; we may
fore
ſay that the right motion ſerves to conduct the matter to erect
the
work; but once erected, that it is to reſt immoveable, or if

moveable
, to move it ſelf onely circularly.
Unleſs we will ſay
with
Plato, that theſe mundane bodies, after they had been made
and
finiſhed, were for a certain time moved by their Maker, in a
right
motion, but that after their attainment to certain and
terminate
places, they were revolved one by one in Spheres,
ſing
from the right to the circular motion, wherein they have
been
ever ſince kept and maintained.
A ſublime conceipt, and

worthy
indeed of Plato: upon which, I remember to have heard
our
common friend the ^{*}Lyncean Academick diſcourſe in this
ner
, if I have not forgot it.
Every body for any reaſon
ted
in a ſtate of reſt, but which is by nature moveable, being ſet

at
liberty doth move; provided withal, that it have an
tion
to ſome particular place; for ſhould it ſtand indifferently
fected
to all, it would remain in its reſt, not having greater
ducement
to move one way than another.
From the having of
this
inclination neceſſarily proceeds, that it in its moving ſhall

tinually
increaſe its acceleration, and beginning with a moſt ſlow
motion
, it ſhall not acquire any degree of velocity, before it
ſhall
have paſſed thorow all the degrees of leſs velocity, or
ter
tardity: for paſſing from the ſtate of quiet (which is the

finite
degree of tardity of motion) there is no reaſon by which
it
ſhould enter into ſuch a determinate degree of velocity, before
it
ſhall have entred into a leſs, and into yet a leſs, before it entred
into
that: but rather it ſtands with reaſon, to paſs firſt by thoſe
degrees
neareſt to that from which it departed, and from thoſe to
the
more remote; but the degree from whence the moveable

began
to move, is that of extreme tardity, namely of reſt.

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