It is all the same to the outcome whether I say that in the empirical progress in space I could encounter stars that are a hun dred times farther from me than the most distant ones I see, or whether I say that perhaps they are there to be encountered in world space even if no human being has ever perceived them or ever will perceive them; for if they were given as things in themselves, without any reference to possible experience at all, then they would be nothing for me, hence they would not be objects contained in the series of the empirical regress.