He rightly points out that he is not comparing the number of such lines or planes, which we do not know (that is, it is rather an empty representation, as just remarked, introduced as prop), but only the magnitude, that is, the quantitative determinateness as such which is equal to the space occupied by these lines; because this space is enclosed within limits, its magnitude is also enclosed within these limits; the continuous is nothing other than the indivisibles themselves, he says; if it were anything apart from them, it would not be comparable; but it would be absurd to say that bounded continuous figures are not comparable with each other.