[Footnote 11: Clarke, _Discourse concerning the Unchangeable Obligations of Natural Religion_, p. 179.] The influence of intellectual considerations upon moral judgments is certainly immense. We shall find that the evolution of the moral consciousness to a large extent consists in its development from the unreflecting to the reflecting, from the unenlightened to the enlightened. All higher emotions are determined by cognitions, they arise {11} from "the presentation of determinate objective conditions";[12] and moral enlightenment implies a true and comprehensive presentation of those objective conditions by which the moral emotions, according to their very nature, are determined. Morality may thus in a much higher degree than, for instance, beauty be a subject of instruction and of profitable discussion, in which persuasion is carried by the representation of existing data. But although in this way many differences may be accorded, there are points in which unanimity cannot be reached even by the most accurate presentation of facts or the subtlest process of reasoning. [Footnote 12: Marshall, _Pain_, _Pleasure_, _and Aesthetics_, p. 83.] Whilst certain phenomena will almost of necessity arouse similar moral emotions in every mind which perceives them clearly, there are others with which the case is different. The emotional constitution of man does not present the same uniformity as the human intellect. Certain cognitions inspire fear in nearly every breast; but there are brave men and cowards in the world, independently of the accuracy with which they realise impending danger. Some cases of suffering can hardly fail to awaken compassion in the most pitiless heart; but the sympathetic dispositions of men vary greatly, both in regard to the beings with whose sufferings they are ready to sympathise, and with reference to the intensity of the emotion. The same holds good for the moral emotions. The existing diversity of opinion as to the rights of different classes of men and of the lower animals, which springs from emotional differences, may no doubt be modified by a clearer insight into certain facts, but no perfect agreement can be expected as long as the conditions under which the emotional dispositions are formed remain unchanged. Whilst an enlightened mind _must_ recognise the complete or relative irresponsibility of an animal, a child, or a madman, and _must_ be influenced in its moral judgment by the motives of an act--no intellectual enlightenment, no scrutiny of facts, can decide how far the interests of the {12} lower animals should be regarded when conflicting with those of men, or how far a person is bound, or allowed, to promote the welfare of his nation, or his own welfare, at the cost of that of other nations or other individuals. Professor Sidgwick's well-known moral axiom, "I ought not to prefer my own lesser good to the greater good of another,"[13] would, if explained to a Fuegian or a Hottentot, be regarded by him, not as