SIMPL. And who ſaith that I cannot draw other lines? why
may not I protract another line underneath, unto the point A,
that may be perpendicular to the reſt?
may not I protract another line underneath, unto the point A,
that may be perpendicular to the reſt?
SALV. You can doubtleſs, at one and the ſame point, make no
more than three right lines concurre, that conſtitute right angles
between themſelves.
more than three right lines concurre, that conſtitute right angles
between themſelves.
SAGR. I ſee what Simplicius means, namely, that ſhould the
ſaid D A be prolonged downward, then by that means there might
be drawn two others, but they would be the ſame with the firſt
three, differing onely in this, that whereas now they onely touch,
then they would interſect, but not produce new
ſaid D A be prolonged downward, then by that means there might
be drawn two others, but they would be the ſame with the firſt
three, differing onely in this, that whereas now they onely touch,
then they would interſect, but not produce new
In phyfical proofs
geometrical
neſs is not
ry.
geometrical
neſs is not
ry.
SIMPL. I will not ſay that this your argument may not be
cludent; but yet this I ſay with Ariſtotle, that in things natural
it is not alwaies neceſſary, to bring Mathematical demonſtrations.
cludent; but yet this I ſay with Ariſtotle, that in things natural
it is not alwaies neceſſary, to bring Mathematical demonſtrations.
SAGR. Grant that it were ſo where ſuch proofs cannot be had,
yet if this caſe admit of them, why do not you uſe them? But it
would be good we ſpent no more words on this particular, for I
think that Salviatus will yield, both to Ariſtotle, and you,
out farther demonſtration, that the World is a body, and perfect,
yea moſt perfect, as being the greateſt work of God.
yet if this caſe admit of them, why do not you uſe them? But it
would be good we ſpent no more words on this particular, for I
think that Salviatus will yield, both to Ariſtotle, and you,
out farther demonſtration, that the World is a body, and perfect,
yea moſt perfect, as being the greateſt work of God.
SALV. So really it is, therefore leaving the general contempla
tion of the whole, let us deſcend to the conſideration of its parts,
which Ariſtotle, in his firſt diviſion, makes two, and they very
rent and almoſt contrary to one another; namely the Cœleſtial,
and Elementary: that ingenerable, incorruptible, unalterable,
paſſible, &c. and this expoſed to a continual alteration,
on, &c. Which difference, as from its original principle, he
rives from the diverſity of local motions, and in this method he
proceeds.
Parts of the world
are two, according
to Ariſtotle,
ſtial and
tary contrary to
one another.
are two, according
to Ariſtotle,
ſtial and
tary contrary to
one another.
Leaving the ſenſible, if I may ſo ſpeak, and retiring into the
Ideal world, he begins Architectonically to conſider that nature
being the principle of motion, it followeth that natural bodies be
indued with local motion. Next he declares local motion to be
of three kinds, namely, circular, right, and mixt of right and
cular: and the two firſt he calleth ſimple, for that of all lines the
circular, and right are onely ſimple; and here ſomewhat
ſtraining himſelf, he defineth anew, of ſimple motions, one to be
circular, namely that which is made about the medium, and the
other namely the right, upwards, and downwards; upwards, that
which moveth from the medium; downwards, that which goeth
wards the medium. And from hence he infers, as he may by and
ceſſary conſequence, that all ſimple motions are confined to theſe
three kinds, namely, to the medium, from the medium, and about
the medium; the which correſponds ſaith he, with what hath been
ſaid before of a body, that it alſo is perfected by three things, and ſo
Ideal world, he begins Architectonically to conſider that nature
being the principle of motion, it followeth that natural bodies be
indued with local motion. Next he declares local motion to be
of three kinds, namely, circular, right, and mixt of right and
cular: and the two firſt he calleth ſimple, for that of all lines the
circular, and right are onely ſimple; and here ſomewhat
ſtraining himſelf, he defineth anew, of ſimple motions, one to be
circular, namely that which is made about the medium, and the
other namely the right, upwards, and downwards; upwards, that
which moveth from the medium; downwards, that which goeth
wards the medium. And from hence he infers, as he may by and
ceſſary conſequence, that all ſimple motions are confined to theſe
three kinds, namely, to the medium, from the medium, and about
the medium; the which correſponds ſaith he, with what hath been
ſaid before of a body, that it alſo is perfected by three things, and ſo
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