so is it also in the case of the intermediates; for there also the members of the same kind are infinite in number), so that if there are not besides perceptible and mathematical objects others such as some maintain the Forms to be, there will be no substance which is one in number as well as in kind, nor will the first principles of things be determinate in number, but only in kind if then this must be so, the Forms also must therefore be held to exist.