The latter.

Then that which is one is both a whole and has a part?

Certainly.

Again, of the parts of the one, if it is--I mean being and one--does either
fail to imply the other? is the one wanting to being, or being to the one?

Impossible.

Thus, each of the parts also has in turn both one and being, and is at the
least made up of two parts; and the same principle goes on for ever, and
every part whatever has always these two parts; for being always involves
one, and one being; so that one is always disappearing, and becoming two.

Certainly.

And so the one, if it is, must be infinite in multiplicity?

Clearly.

Let us take another direction.

What direction?

We say that the one partakes of being and therefore it is?

Yes.