— 177 —
Motion proves a Vacuum.       §22. But not to go so far as beyond the utmost bounds of Body
in the Universe, nor appeal to God’s Omnipotency to find a Vacuum,
the motion of Bodies, that are in our view and neighbourhood, seem
to me plainly to evince it. For I desire any one so to divide a solid
Body, of any dimension he pleases, as to make it possible for the
solid Parts to move up and down freely every way within the
bounds of that Superficies, if there be not left in it a void space, as
big as the least part into which he has divided the said solid Body.
And if where the least Particle of the Body divided, is as big as a
Mustard-seed, a void Space equal to the bulk of a Mustard-seed, be
requisite to make room for the free motion of the Parts of the
divided Body within the bounds of its Superficies, where the
Particles of Matter are 100,000,000 less than a Mustard-seed, there
must also be a space void of solid Matter, as big as 100,000,000 part
of a Mustard-seed; for if it holds in one, it will hold in the other,
and so on in infinitum. And let this void Space be as little as it will, it
— 178 —
destroys the Hypothesis of Plenitude. For if there can be a Space
void of Body, equal to the smallest separate Particle of Matter now
existing in Nature, ’tis still Space without Body; and makes as great
a difference between Space and Body, as if it were Μέγα χάσμα,
a distance as wide as any in Nature. And therefore if we suppose not
the void Space necessary to Motion, equal to the least parcel of the
divided solid Matter, but to 1/10 or 1/1000 of it, the same consequence
will always follow of Space without Matter.
Locke Hum II, 13, §22, pp. 177-178