If, however, any man takes this position and professes to be incapable of knowing whether or not there is any power above and behind material things, it will be necessary to begin with the very elements of knowledge, and to inquire if there is anything whatever that he really knows and believes. Let us ask him if he can subscribe to the simple creed expressed in the words "I am, I feel, I think." Should he deny these propositions, then there is no basis left on which to argue. Should he admit this much of belief, he has abandoned somewhat of his agnostic position; for it would be easy to show that in even uttering the pronoun "I" he has committed himself to the belief in the unknowable. What is the _ego_ which he admits? Is it the material organism or any one of its organs or parts? or is it something distinct, of which the organism is merely the garment, or outward manifestation? or is the organism itself anything more than a bundle of appearances partially known and scarcely understood by that which calls itself "I"? Who knows? And if our own personality is thus inscrutable, if we can conceive of it neither as identical with the whole or any part of the organism nor as existing independently of the organism, we should begin our Agnosticism here, and decline to utter the pronoun "I" as implying what we cannot know. Still, as a matter of faith, we must hold fast to the proposition "I exist" as the only standpoint for science, philosophy, or common life. If we are asked for evidence of this faith, we can appeal only to our consciousness of effects which imply the existence of the _ego_, which we thus have to admit or suppose before we can begin to prove even its existence.