Although the facts which have been adduced above, are inexplicable by the Limitists, and are decisive of the actuality of the Reason, as it has been heretofore described, yet another line of argument of great wight must not be omitted. There are in language certain _positive_ terms, which the Limitists, and the advocates of the Reason agree in asserting cannot convey any meaning to, or be explained by the Sense and Understanding. Such are the words infinite and absolute. The mere presence of such words in language, as positive terms, is a decisive evidence of the fact, that there is also a faculty which entertains positive ideas corresponding to them. Sir William Hamilton's position in this matter, is not only erroneous, but astonishing. He asserts that these words express only "negative notions." "They," the infinite and absolute, "can be conceived only by a thinking away from, or abstraction of, those very conditions under which thought itself is realized; consequently, the notion of the Unconditioned is only negative--negative of the conceivable itself." But, if this is true, how came these words in the language at all? Negative ideas produce negative expressions. Indeed, the Limitists are confidently challenged to designate another case in language, in which a positive term can be alleged to have a _purely_ negative signification. Take an illustration to which we shall recur further on. The question has been raised, whether a sixth sense can be. Can the Limitists find in language, or can they construct, a positive term which will represent the negation of a sixth sense? We find in language the positive terms, ear and hearing; but can such positive terms be found, which will correspond to the phrase, no sixth sense? In this instance, in physics, the absurdity is seen at once. Why is not as readily seen the equal absurdity of affirming that, in metaphysics, positive terms have grown up in the language which are simple negations? Here, for the present, the presentation of facts may rest. Let us recapitulate those which have been adduced. The axioms in mathematics, the principles of the relations of being, the laws of aesthetics, and most of all the whole system of principles pertaining to morals and religion, standing, as they do, a series of mental affirmations, which all mankind, except the Limitists, qualify as necessary and universal, compel assent to the proposition, that there must be a faculty different in kind from the Sense and Understanding,--for these have already been found impotent--which can be ground to account of all these facts satisfactorily. And the presence in language of such positive terms as absolute and infinite, is a most valuable auxiliary argument. The faculty which is required,--the faculty which qualifies all the products of its activity with the characteristics above named, is the Pure Reason. And its actuality may therefore be deemed established.