Kant attempts to escape from this difficulty by claiming that there is one feeling which is rational, and not sensuous in quality, being excited not by the conception of pleasure or pain, but by that of the moral law itself. This is the feeling of reverence, and through this feeling we can be moved to moral action. Waiving the question whether the mere idea of law in general would be capable of arousing any moral sentiment--or, putting the matter from the other side, whether Kant gives us a true account of the feeling of reverence--it is clear that this admission is fatal to Kant's theory. If desire or feeling as such is sensuous (or _pathological_, as Kant terms it), what right have we to make this one exception? And if we can make this one exception, why not others? If it is possible in the case of reverence, why not in the case, say, of patriotism, or of friendship, or of philanthropy, or of love--or even of curiosity, or of indignation, or of desire for approbation? Kant's separation of reverence, as the one moral sentiment from all others as pathological, is wholly arbitrary. The only distinction we can draw is of the feelings as they well up naturally in reaction upon stimuli, sentiments not conceived and thus neither moral nor immoral, and sentiments as transformed by ends of action, in which case all without exception may be moral or immoral, according to the character of the end. The Kantian separation is not only arbitrary psychologically, but is false historically. So far is it from true that the only moral sentiment is reverence for law, that men must have been moved toward action for centuries by motives of love and hate and social regard, before they became capable of such an abstract feeling as reverence. And it may be questioned whether this feeling, as Kant treats it, is even the highest or ultimate form of moral sentiment--whether it is not transitional to love, in which there is complete union of the individual interest on one hand, and the objective end on the other. For these criticisms at greater length, see Caird, Critical Philosophy of Kant, Vol. II, Bk. II, ch. IV.