For if anyone happens to believe
that heavier bodies, since they are carried
straight down though empty space more rapidly,
could hit the lighter ones from up above
and in this way generate collisions,
which could then create productive motions,
he is moving backwards and is far removed
from truthful reasoning. For all objects
which sink through water, even through thin air,
must, depending on their weight, move faster
in this fall, since the material substance
in water and the nature of thin air
can hardly hold back each thing equally:
heavier bodies will overpower them,
and they will move aside more rapidly.
But, by contrast, an empty space cannot
hold back a single thing at any time
or any place, since it keeps giving way,
as its own nature forces it to do.
That is why all bodies set in motion,
even though their weights may be unequal,
must be carried through unresisting void
at the same rate.