But now, says Mr. Spencer, when thought undertakes to have as its product the idea of endless space, it makes an effort to pass beyond its sphere; the elements of thought fail, and therefore the law of thought fails; the product is nothing but a dim symbol of a product; the process becomes nothing but a dim symbol of a process; and no predicament, that is, no fact, is here inferable from the law of thought as a fact or predicament that can be asserted. But what, in the case supposed, is the fact or predicament that is asserted, when we speak or think of endless space, or of space that transcends all our powers of measurement? Is it correct to say that the law of thought fails, because we can not express endless space in feet or miles? Is it true that we have only "symbolized" the product of endless space out of the data or elements of measurable space? Here it is necessary to inquire what the learned philosopher means by "symbolizing" a product or a process. I understand him to mean, in the case supposed, that whereas in reference to the idea or product of a measurable space we have certain data or elements out of which to form that idea, when we undertake to think of endless space we transfer the notion of a measurable space to that of which no measure can be predicated, and therefore we can have no conception of endless space, but only a "formless consciousness of the inscrutable." Let us see if this is sound. Take as a convenient idea of a measurable space the 92,000,000 miles from the earth to the sun, and lay it down on paper. If, after having measured this space, we could transport ourselves to the sun, we could extend the line in the same direction beyond the sun, by laying down a further measurement of 92,000,000 miles from the sun to any object that we could observe beyond the sun. This process we could repeat indefinitely and forever, if we could be successively removed to the different stages at each point of departure. But when an aggregate of such multiplied measurements had been reached greater than could be expressed in figures, we should still have the intellectual power of thinking of an extension of space indefinitely beyond that which we have measured. Nothing would have failed us but the power of expressing in figures the endless extent of space which lies beyond the utmost limit that we can so express.