But when we realize that we do not mean by space merely the actual relations which exist between the touch things that make up the world, but also the _possible_ relations, _i.e._ that we mean the whole _plan_ of the world system, we can see that it is not unreasonable to speak of space as infinite.
The material universe may, for aught we know, be limited in extent.
The actual space relations in which things stand to each other may not be limitless.

But these actual space relations taken alone do not constitute space.

Men have often asked themselves whether they should conceive of the universe as limited and surrounded by void space.

It is not nonsense to speak of such a state of things.

It would, indeed, appear to be nonsense to say that, if the universe is limited, it does not lie in void space.