thought have been bestowed upon them. The principal question of these
letters gives occasion to observe, how even the mind of Newton gains
ground, gradually, upon darkness.

"As to your first query," says he, "it seems to me, that if the matter
of our sun and planets, and all the matter of the universe, were evenly
scattered, throughout all the heavens, and every particle had an innate
gravity towards all the rest, and the whole space, throughout which this
matter was scattered, was but finite, the matter on the outside of this
space would, by its gravity, tend towards all the matter on the inside,
and, by consequence, fall down into the middle of the whole space, and
there compose one great spherical mass. But if the matter was evenly
disposed throughout an infinite space, it could never convene into one
mass, but some of it would convene into one mass, and some into another,
so as to make an infinite number of great masses, scattered, at great
distances, from one to another, throughout all that infinite space. And
thus might the sun and fixed stars be formed, supposing the matter were
of a lucid nature. But how the matter should divide itself into two
sorts, and that part of it, which is fit to compose a shining body,
should fall down into one mass, and make a sun, and the rest, which is
fit to compose an opaque body, should coalesce, not into one great body,
like the shining matter, but into many little ones; or, if the sun, at
first, were an opaque body, like the planets, or the planets lucid
bodies, like the sun, how he alone should be changed into a shining
body, whilst all they continue opaque, or all they be changed into
opaque ones, whilst he remains unchanged, I do not think more explicable
by mere natural causes, but am forced to ascribe it to the counsel and
contrivance of a voluntary agent."

The hypothesis of matter evenly disposed through infinite space, seems