thinking," "mode of feeling and thinking," "habit of thought," "moral and intellectual character or constitution," and the like. Or, again, if we will have an image of that which from its nature is unimaginable, then, in our efforts to be as pure and abstract as possible, we find ourselves driven, as I have said, into a fancy of mind as a kind of clear aërial transparency, unbounded or of indefinite bounds, and yet not a dead transparency, but a transparency full of pulses, powers, motions, and whirls, capable in a moment of clouding itself, ceasing to be a transparency, and becoming some strange solid phantasmagory, as of a landscape smiling in sunshine or a sky dark with a storm. Yet again there is another and more mechanical conception of mind which may be of occasional use. The thinking power, the thinking principle, the substance which feels and thinks, are phrases for mind from of old: what if we were to agree, for a momentary advantage, to call mind rudely the thinking apparatus? What the advantage may be will presently appear. Mind, mode of thinking, mode of thinking and feeling, moral and intellectual constitution, that mystic transparency full of pulses and motions, this thinking apparatus,--whichever phrase or image we adopt, there are certain appertaining considerations which we have to take along with us. (1.) There is the consideration of differences of degree, quality, and worth. Mind may be great or small, noble or mean, strong or weak; the mode of thinking of one person or one time may be higher, finer, grander than that of another; the moral and intellectual constitutions of diverse individuals or peoples may present all varieties of the admirable and lovely or the despicable and unlovely; the pulses and motions in that mystic transparency which we fancy as one man's mind may be more vehement, more awful, more rhythmical and musical, than are known in that which we fancy as the mind of some other; the thinking apparatus which A possesses, and by which he performs the business of his life, may be more massive, more complex, more exquisite, capable of longer reaches and more superb combinations, than that which has fallen to the lot of B. All this is taken for granted everywhere; all our speech and conduct proceed on the assumption.