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# Title: Wherein the chief Causes of Error and Difficulty in the Sciences, with the Grounds of Scepticism, Atheism, and Irreligion, are inquir'd into (shelfmark Leibn. Marg. 52)
# Folio 116, page id 797331344:0128
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116
Of the Principles
Part I.
cerning the Existence ot a Thing di-
Rinet Fro Spirit and Idea, CEOM PEF-
ceirins and beins Perceird: Buc nhe-
cher there are nor certain Ideas, oF L
bnow noc what Sort, in che Mind et
C10D, Wtrich arc (o mans Marks Or
Noces, thac direet tum howr to produce
Senlations in our Minds, in a constant
and regular Mechod: Much atcer che
lame manner, a5 a Mulician is directed
by cheetoces ot Music, to produce chat
harmonious tram and compolicion ot
Sound, wtich is called a Tune; tho
cher Who Flear che Mulic do noc Per-
ceire che Noces, and may bc incirely
ignorant ot them. Buc this Notion ot
Matcer (Wrhuch alter all is the only in
cellisible one that l can pick, trom
Wrtrac is Caid oE untnoru Occalions)
leCmS IOO extraraSanE 1O delerre a
Contutation. Belides, it is in effect no
Objection asainst Wrtrac re hare ad-
vanced, 2iz. That chere is no sen selels, un
Perceir d Substance.
5 72. TF We follo cheLiohEOF RCa-
Con, We sall, From the constane unI.
FOri