The idea of an indivisible, ultimate atom is inconceivable by the lay
mind. If we can conceive an idea of the atom at all, we can conceive it
as capable of being cut in half indeed, we cannot conceive it at all
unless we so conceive it. The only true atom, the only thing which we
cannot subdivide and cut in half, is the universe. We cannot cut a bit
off the universe and put it somewhere else. Therefore, the universe is a
true atom and, indeed, is the smallest piece of indivisible matter which
our minds can conceive; and they cannot conceive it any more than they
can the indivisible, ultimate atom.